[Bug 90871] New: NV30: Xfwm4 use_compositing - garbled display

[Bug 90871] New: NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

            Bug ID: 90871
           Summary: NV30: Xfwm4 use_compositing -  garbled display
           Product: xorg
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Garbled display
~~~~~~~~~~~~~~~


Chipset: NV34 (NV34)
Family : NV30

NVIDIA Corporation NV34 [GeForce FX 5200]
Kernel driver in use: nouveau
Kernel modules: nouveau
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fedora 22 i686


1. Starting from - Xpresent support: no

commit fee08eafa751a153ff93b04152ea66334141cac5
Author: Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org>
Date:   Thu Apr 9 23:06:38 2015 +0200

    compositor: Add support for GLX

    Bug: 10439

    Using texture-from-pixmap extension.

    Signed-off-by: Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org>


Build Configuration for xfwm4 version 4.12.0git.fee08ea revision fee08ea:
  Startup notification support: yes
  XSync support:                yes
  Render support:               yes
  Xrandr support:               yes
  Xpresent support:             no
  Embedded compositor:          yes
  Epoxy support:                yes
  KDE systray protocol proxy:   no


~~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~ ~~~~~~~ ~~~~~~ ~~~~~ ~~~~ ~~~ ~~ ~


2. Starting from - Xpresent support: yes

commit aee242cec4c3d8e8232d67875ec9fbfbeb504a9d
Author: Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org>
Date:   Mon Apr 27 21:40:27 2015 +0200

    compositor: Prefer GL over Present

    If both are available, try to use GL first and next Present.

    Signed-off-by: Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org>


Build Configuration for xfwm4 version 4.12.0git.aee242c revision aee242c:
  Startup notification support: yes
  XSync support:                yes
  Render support:               yes
  Xrandr support:               yes
  Xpresent support:             yes
  Embedded compositor:          yes
  Epoxy support:                yes
  KDE systray protocol proxy:   no



https://bugzilla.xfce.org/show_bug.cgi?id=11962

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #1 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

- Fedora 21 - working Xfvm4 compositing setup:

xorg-x11-server-Xorg 1.16.3-2.fc21
xorg-x11-drv-nouveau 1.0.11-1.fc21
mesa 10.4.7-1.20150323.fc21
libdrm 2.4.60-1.fc21
libXpresent 1.0.0-1.fc21
xfwm4 4.12.3-3.git20150518.fc21


- Fedora 22 - none working Xfvm4 compositing setup - garbled display:

xorg-x11-server-Xorg 1.17.1-12.fc22
xorg-x11-drv-nouveau 1.0.11-2.fc22
mesa 10.5.4-1.20150505.fc22
libdrm 2.4.61-3.fc22
libXpresent 1.0.0-1.fc22
xfwm4 4.12.3-3.git20150518.fc22

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #2 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

All component downgraded to versions such as working setup on Fedora 21,
but without positive effect.
Looks like libepoxy has become broken for unknown reasons.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #3 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
(In reply to poma from comment #2)
> All component downgraded to versions such as working setup on Fedora 21,
> but without positive effect.
> Looks like libepoxy has become broken for unknown reasons.

You mean it's a regression between F21 and F22?

Then it isn't libepoxy (which is just a conveninent library to load GL
extensions and such) nor the DDX but most likely Mesa or DRI/DRM instead.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #4 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

What I actually wanted to write,
epoxy support is related to the usage, enablement of the OpenGL, right?
And here it is about compositing part.
If I understood this library simplifies writing code related to OpenGL.

About distro versions "regression",
I expected the Xorg/Mesa/libdrm from Fedora 21 to work also on Fedora 22,
but surprise, surprise, it didn't happen.

I tested also
[Mesa-announce] Mesa 10.5.7
http://lists.freedesktop.org/archives/mesa-announce/2015-June/000157.html
No effect positivo.

Also it is not possible to test whether the NV30 works with 'modesetting':

Driver "modesetting"
~~~~~~
Require OpenGL version 2.1 or later.
(EE) modeset(0): Failed to initialize glamor at ScreenInit() time.
(EE) 
Fatal server error:
(EE) AddScreen/ScreenInit failed for driver 0
(EE) 
(EE) Server terminated with error (1). Closing log file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Driver "modesetting"
Option "AccelMethod" "none"
~~~~~~
(II) AIGLX: Screen 0 is not DRI2 capable
(EE) AIGLX: reverting to software rendering
(II) AIGLX: Loaded and initialized swrast
(II) GLX: Initialized DRISWRAST GL provider for screen 0
(EE) 
Fatal server error:
(EE) failed to create screen resources(EE) 
(EE) Server terminated with error (1). Closing log file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Therefore for now I can not conclude what this is all about.
At least Xpresent rendering works, although "serrated" - not quite tear-free.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |major

--- Comment #5 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

I recompiled Fedora 21 versions:

libdrm-2.4.60-1.fc22.i686
xorg-x11-server-common-1.16.3-2.fc22.i686
xorg-x11-server-Xorg-1.16.3-2.fc22.i686
xorg-x11-drv-modesetting-0.9.0-2.fc22.i686
xorg-x11-drv-nouveau-1.0.11-1.fc22.i686
mesa-dri-drivers-10.4.7-1.20150323.fc22.i686
mesa-filesystem-10.4.7-1.20150323.fc22.i686
mesa-libEGL-10.4.7-1.20150323.fc22.i686
mesa-libgbm-10.4.7-1.20150323.fc22.i686
mesa-libGL-10.4.7-1.20150323.fc22.i686
mesa-libglapi-10.4.7-1.20150323.fc22.i686
mesa-libGLES-10.4.7-1.20150323.fc22.i686

and tried once more,
but the result is the same - "analytical cubism" - with Xfwm4 GLX build
$ xfconf-query -c xfwm4 -p /general/use_compositing
true


Interestingly, in contrast to Xorg-1.17.1,
on Xorg-1.16.3 NV30 can work with 'modesetting':

[ 8.911] 
X.Org X Server 1.16.3
Release Date: 2014-12-20
[ 8.911] X Protocol Version 11, Revision 0
[ 8.911] Build Operating System: lnx 4.0.4-303.fc22.i686 
[ 8.914] Build Date: 09 June 2015  04:53:40PM
[ 8.914] Build ID: xorg-x11-server 1.16.3-2.fc22 
[ 8.914] Current version of pixman: 0.32.6
[ 8.914] (==) Log file: "/var/log/Xorg.0.log", Time: Tue Jun  9 19:36:31 2015
[ 8.915] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 8.915] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 8.915] (==) No Layout section.  Using the first Screen section.

[ 8.915] (==) No screen section available. Using defaults.
[ 8.915] (**) |-->Screen "Default Screen Section" (0)
[ 8.915] (**) |   |-->Monitor "<default monitor>"
[ 8.916] (==) No device specified for screen "Default Screen Section".
    Using the first device section listed.
[ 8.916] (**) |   |-->Device "NVIDIA NV34"
[ 8.916] (==) No monitor specified for screen "Default Screen Section".
    Using a default monitor configuration.
[ 8.916] (==) Automatically adding devices
[ 8.916] (==) Automatically enabling devices
[ 8.916] (==) Automatically adding GPU devices
[ 8.916] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 8.916] (II) Loader magic: 0x8282740
[ 8.916] (II) Module ABI versions:
[ 8.916]     X.Org ANSI C Emulation: 0.4
[ 8.916]     X.Org Video Driver: 18.0
[ 8.916]     X.Org Server Extension : 8.0
[ 8.924] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 8.929] (II) LoadModule: "glx"
[ 8.929] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 8.948] (II) Module glx: vendor="X.Org Foundation"
[ 8.948]     compiled for 1.16.3, module version = 1.0.0
[ 8.948]     ABI class: X.Org Server Extension, version 8.0
[ 8.948] (==) AIGLX enabled
[ 8.948] (II) LoadModule: "modesetting"
[ 8.948] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 8.948] (II) Module modesetting: vendor="X.Org Foundation"
[ 8.948]     compiled for 1.16.3, module version = 0.9.0
[ 8.948]     Module class: X.Org Video Driver
[ 8.948]     ABI class: X.Org Video Driver, version 18.0
[ 8.948] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 8.948] (++) using VT number 1

[ 8.949] (II) modesetting(0): using drv /dev/dri/card0
[ 8.949] (II) modesetting(0): Creating default Display subsection in Screen
section
[ 9.039] (II) modesetting(0): Output DVI-0 has no monitor section
[ 9.186] (II) modesetting(0): EDID for output DVI-0
[ 9.215] (II) modesetting(0): Output DVI-0 connected
[ 9.217] (==) modesetting(0): Backing store enabled
[ 9.217] (II) modesetting(0): RandR 1.2 enabled, ignore the following RandR
disabled message.
[ 9.238] (==) modesetting(0): DPMS enabled
[ 9.260] (--) RandR disabled
[ 9.277] (II) AIGLX: Screen 0 is not DRI2 capable
[ 9.277] (EE) AIGLX: reverting to software rendering
[ 9.295] (II) AIGLX: Loaded and initialized swrast
[ 9.295] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 9.297] (II) modesetting(0): Damage tracking initialized
[ 9.297] (II) modesetting(0): Setting screen physical size to 370 x 277
...

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Driver/nouveau              |Drivers/DRI/nouveau
            Version|unspecified                 |10.5
            Product|xorg                        |Mesa
         QA Contact|xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org       |nouveau-PD4FTy7X32lNgt0PjOBp93rCq3LdnpKM@public.gmane.org
                   |                            |rg

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86 (IA32)                  |x86-64 (AMD64)

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86-64 (AMD64)              |x86 (IA32)

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|10.5                        |git

--- Comment #6 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

Same with latest git:

mesa-dri-drivers-10.7.0-0.devel.1.563706c.fc22.i686
mesa-filesystem-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libEGL-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libgbm-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libGL-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libglapi-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libGLES-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libGLU-9.0.0-7.fc22.i686
mesa-libGLw-8.0.0-5.fc22.i686
mesa-libOpenCL-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libOSMesa-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libwayland-egl-10.7.0-0.devel.1.563706c.fc22.i686
mesa-libxatracker-10.7.0-0.devel.1.563706c.fc22.i686
mesa-omx-drivers-10.7.0-0.devel.1.563706c.fc22.i686
mesa-vdpau-drivers-10.7.0-0.devel.1.563706c.fc22.i686

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #7 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 116415
  --> https://bugs.freedesktop.org/attachment.cgi?id=116415&action=edit
Xfwm4 GLX compositing NV34 Mesa 10.7.0 devel git 563706c

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #8 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 116416
  --> https://bugs.freedesktop.org/attachment.cgi?id=116416&action=edit
glxinfo NV34 OpenGL 1.5 Mesa 10.7.0 devel git 563706c

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #9 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to poma from comment #5)
...
> Interestingly, in contrast to Xorg-1.17.1,
> on Xorg-1.16.3 NV30 can work with 'modesetting':
> 

FTR
Xorg-1.17.1 'modesetting' ist kaputt also with NV50.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #10 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to poma from comment #9)
> (In reply to poma from comment #5)
> ...
> > Interestingly, in contrast to Xorg-1.17.1,
> > on Xorg-1.16.3 NV30 can work with 'modesetting':
> > 
> 
> FTR
> Xorg-1.17.1 'modesetting' ist kaputt also with NV50.

Precisely - with 32 bit
https://bugs.freedesktop.org/show_bug.cgi?id=90978

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #11 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
Created attachment 116536
  --> https://bugs.freedesktop.org/attachment.cgi?id=116536&action=edit
test program


Can you try with this test program and see if you can reproduce:

1. Save attachment as tfp-test.c

2. Build with 

  $ gcc -g tfp-test.c -o tfp-test $(pkg-config --cflags --libs epoxy xrender
xfixes xcomposite x11)

3. Run with 

  $ ./tfp-test

4. Use the mouse button to chaneg the Pixmap/texture or press a key to exit.

If you can reproduce then we may have a simple reproducer, that could be
helpful with the investigation.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #12 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
BTW, irrespective of any shortcomings in the modesetting driver, there's 0
chance that GLAMOR will work on nv3x. And like 0.00000000000000001% chance
it'll work on nv4x. The driver logic is just not there to handle those giant
shaders. It should, however, work fine on nv50+, which has a real compiler
backing it.

With xf86-video-nouveau you should be getting dedicated EXA acceleration logic.
I did notice a small bug in some of the pre-nv50 logic while trying to fix
something else:

http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=278ad73475bd137eac8a49ec7a22406bfc2867e7

Unlikely to fix anything for you, but thought I'd mention it.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #13 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 116544
  --> https://bugs.freedesktop.org/attachment.cgi?id=116544&action=edit
xfwm4-debug-1328.log


xfwm4-4.12.3-11.3.glx.debug.full.git20150615.fc22.i686
xfwm4-debuginfo-4.12.3-11.3.glx.debug.full.git20150615.fc22.i686

Déjà vu, en mouvement:
http://goo.gl/Gm4ffO
Screencast/discothèque.webm

-_-

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #14 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
(In reply to poma from comment #13)

I am not sure xfwm4 logs will help much here.

What about the test program I posted in comment 11, it does the same as xfwm4
but in a much shorter/simpler code so if you can reproduce with that, this may
help investigating more than just the xfwm4 logs.

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #15 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Olivier Fourdan from comment #14)
> (In reply to poma from comment #13)
> 
> I am not sure xfwm4 logs will help much here.
> 
> What about the test program I posted in comment 11, it does the same as
> xfwm4 but in a much shorter/simpler code so if you can reproduce with that,
> this may help investigating more than just the xfwm4 logs.


Déjà vu, déjà vu.

It's already done - this is a visual record:
http://goo.gl/Gm4ffO
Screencast/discothèque.webm

xfwm4-debug-1328.log is a record of the entire session, 
-including- 'tfp-test' run.

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #16 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 117490
  --> https://bugs.freedesktop.org/attachment.cgi?id=117490&action=edit
lovelock.png OK - no comps

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #17 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 117491
  --> https://bugs.freedesktop.org/attachment.cgi?id=117491&action=edit
lovelock.png KO/garbled - comps GLX

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #18 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

Olivier, can you tell, just by looking at garbled pattern, what the actual
problem is, the same as Hans de and Ilia do in
http://lists.freedesktop.org/archives/nouveau/2015-August/021767.html
"Look at the white pattern of the moon".

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #19 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Harder to tell, but I think one of two things is happening:

(a) You have the inverse problem. You're getting a linear texture that's being
interpreted as if it were swizzled.
(b) Uninitialized video ram which happened to be some (set of) textures in a
former life.

I'm tending a bit more towards (b) but not 100% sure. I don't know how you
could end up with linear texture data but think it's swizzled, but I'm also not
extremely well-versed in nv30 driver specifics.

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #20 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Thanks for the explanation.

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #21 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Test GLX compositing & tfp-test:
http://goo.gl/Gm4ffO
vids/discothèque.webm

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #22 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
I've tried reproducing this on my oldest card which is a nv43 card, but I'm
afraid that this does not reproduce there ...

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #23 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Hans, do you test exclusively GNOME environment?

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #24 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,

(In reply to poma from comment #23)
> Hans, do you test exclusively GNOME environment?

No to reproduce I did "dnf groupinstall "XFCE Desktop", then startxfce4, and
ensured it was in composting mode, all of this on a fully up2date F-22. I did
not see the problem you are seeing while doing this on a nv43 card.

Regards,

Hans

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #25 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Hans de Goede from comment #24)
> Hi,
> 
> (In reply to poma from comment #23)
> > Hans, do you test exclusively GNOME environment?
> 
> No to reproduce I did "dnf groupinstall "XFCE Desktop", then startxfce4, and
> ensured it was in composting mode, all of this on a fully up2date F-22. I
> did not see the problem you are seeing while doing this on a nv43 card.
> 
> Regards,
> 
> Hans


Here you can find the source rpm of the Xfce's window manager with GLX support:
http://goo.gl/Gm4ffO
source/xfwm4-4.12.3-11.2.glx.git20150615.fc22.src.rpm

Besides it is an integral part of the test compilation:
http://goo.gl/Gm4ffO
iso/Twenty-Two-Xfce-Live-*.iso


Ref.
compositor: Add support for GLX
http://git.xfce.org/xfce/xfwm4/commit/?id=fee08ea

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #26 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
(In reply to poma from comment #25)
> Here you can find the source rpm of the Xfce's window manager with GLX
> support:
> http://goo.gl/Gm4ffO
> source/xfwm4-4.12.3-11.2.glx.git20150615.fc22.src.rpm
> 
> Besides it is an integral part of the test compilation:
> http://goo.gl/Gm4ffO
> iso/Twenty-Two-Xfce-Live-*.iso
> 
> 
> Ref.
> compositor: Add support for GLX
> http://git.xfce.org/xfce/xfwm4/commit/?id=fee08ea

Interesting so what you are saying is that the default F-22 xfwm builds do not
have this patch, and thus cannot be used to reproduce the problem ?

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #27 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Hans de Goede from comment #26)
> (In reply to poma from comment #25)
> > Here you can find the source rpm of the Xfce's window manager with GLX
> > support:
> > http://goo.gl/Gm4ffO
> > source/xfwm4-4.12.3-11.2.glx.git20150615.fc22.src.rpm
> > 
> > Besides it is an integral part of the test compilation:
> > http://goo.gl/Gm4ffO
> > iso/Twenty-Two-Xfce-Live-*.iso
> > 
> > 
> > Ref.
> > compositor: Add support for GLX
> > http://git.xfce.org/xfce/xfwm4/commit/?id=fee08ea
> 
> Interesting so what you are saying is that the default F-22 xfwm builds do
> not have this patch, and thus cannot be used to reproduce the problem ?


4.12.3 is a bug fix release - 2015-05-16:
https://mail.xfce.org/pipermail/xfce-announce/2015-May/000416.html

Although the "compositor: Add support for GLX" commit is the earlier date -
2015-04-24,
it still has not entered the release.

I guess, Olivier left us time to test.


$ grep -R -i glx xfwm4-4.12.3-2.fc23.src/xfwm4-4.12.3/ | wc -l
0
$ grep -R -i glx xfwm4-4.12.3-11.2.glx.git20150615.fc24.src/xfwm4-8a67212/ | wc
-l
175

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #28 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,
(In reply to poma from comment #27)
> (In reply to Hans de Goede from comment #26)
> > (In reply to poma from comment #25)
> > > Here you can find the source rpm of the Xfce's window manager with GLX
> > > support:
> > > http://goo.gl/Gm4ffO
> > > source/xfwm4-4.12.3-11.2.glx.git20150615.fc22.src.rpm
> > > 
> > > Besides it is an integral part of the test compilation:
> > > http://goo.gl/Gm4ffO
> > > iso/Twenty-Two-Xfce-Live-*.iso
> > > 
> > > 
> > > Ref.
> > > compositor: Add support for GLX
> > > http://git.xfce.org/xfce/xfwm4/commit/?id=fee08ea
> > 
> > Interesting so what you are saying is that the default F-22 xfwm builds do
> > not have this patch, and thus cannot be used to reproduce the problem ?
> 
> 
> 4.12.3 is a bug fix release - 2015-05-16:
> https://mail.xfce.org/pipermail/xfce-announce/2015-May/000416.html
> 
> Although the "compositor: Add support for GLX" commit is the earlier date -
> 2015-04-24,
> it still has not entered the release.

Ok, so I've build the src.rpm you linked to, and tried to reproduce the problem
that way, but I still cannot reproduce it:

[hans@plank ~]$ rpm -q xfwm4
xfwm4-4.12.3-11.2.glx.git20150615.fc22.x86_64

So it looks like this only happens on nv3x and not on nv4x.

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--- Comment #29 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Thanks for testing, man.

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--- Comment #30 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
You'd need xfwm4 from git master (with opengl support) to reproduce or simply
use the simple reproducer I attached to this bug some time ago (attachment
116536)

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #31 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Repetitio est mater sapientiae.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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--- Comment #32 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,

(In reply to Olivier Fourdan from comment #30)
> You'd need xfwm4 from git master (with opengl support) to reproduce or
> simply use the simple reproducer I attached to this bug some time ago
> (attachment 116536 [details])

Ok, I just tried with that reproducer, but that also does not reproduce.

I've ordered a quadro nvs280, which is about the only nv3x card with a pci-e
interface available. When that arrives I'll try again.

Regards,

Hans

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #33 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Hans de Goede from comment #32)
> Hi,
> 
> (In reply to Olivier Fourdan from comment #30)
> > You'd need xfwm4 from git master (with opengl support) to reproduce or
> > simply use the simple reproducer I attached to this bug some time ago
> > (attachment 116536 [details])
> 
> Ok, I just tried with that reproducer, but that also does not reproduce.
> 
> I've ordered a quadro nvs280, which is about the only nv3x card with a pci-e
> interface available. When that arrives I'll try again.
> 
> Regards,
> 
> Hans


This is a memorabilia category.

http://www.nvidia.com/object/IO_10854.html - AD 2004.
The nouveau project did not exist at that time.

2 of 3 received AGP version,
http://goo.gl/nfim5z

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #34 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,

(In reply to Hans de Goede from comment #32)
> Hi,
> 
> (In reply to Olivier Fourdan from comment #30)
> > You'd need xfwm4 from git master (with opengl support) to reproduce or
> > simply use the simple reproducer I attached to this bug some time ago
> > (attachment 116536 [details])
> 
> Ok, I just tried with that reproducer, but that also does not reproduce.
> 
> I've ordered a quadro nvs280, which is about the only nv3x card with a pci-e
> interface available. When that arrives I'll try again.

Ok' I've received this card now, and I can reproduce the problem. I'll
investigate and try to fix this next week.

Regards,

Hans

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #35 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,

(In reply to Hans de Goede from comment #34)
> Ok' I've received this card now, and I can reproduce the problem. I'll
> investigate and try to fix this next week.

Ok, so as promised I've been investigating this one the last couple a days.

The fptest.c reproducer works to reproduce it, thanks.

At first I've tried different pitches / to swizzle / tile or not to tile on
various involved buffers on both the ddx and mesa side all to no good.

Today I had the bright idea (should have done that earlier) to run fptest
through apitrace and then glretrace, this resulted in the following messages:

27 @0 glXCreateWindow(dpy = 0x120b0f0, config = 0x125c9c0, win = 6291457, attri
27: warning: unsupported glXCreateWindow call
49: message: major api error 1: GL_INVALID_VALUE in glTexImage2D(invalid width
49 @0 glTexImage2D(target = GL_TEXTURE_2D, level = 0, internalformat = GL_RGBA,
49: warning: glGetError(glTexImage2D) = GL_INVALID_VALUE
88: message: major api error 1: GL_INVALID_VALUE in glTexImage2D(invalid width
88 @0 glTexImage2D(target = GL_TEXTURE_2D, level = 0, internalformat = GL_RGBA,
88: warning: glGetError(glTexImage2D) = GL_INVALID_VALUE
Rendered 2 frames in 0.0754768 secs, average of 26.4982 fps

The 27* messages are there when doing a glretrace on nv4x too, and the retrace
works fine on nv4x, so I believe that this warning can be ignored.

The problem is the next messages. It seems that something (not fptest directly)
is calling glTexImage2D with a npot width / height, where as nv3x is not npot
capable.

I'm a bit lost as to where this call is coming from, and as to whether or not
this is a fptest issue, or an issue with the code which is actually making the
glTexImage2D call. I'll ask Ben / Ilia for help.

Regards,

Hans

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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--- Comment #36 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

ACPI power states test:
- Suspend to RAM aka S3
- Suspend to Disk aka S4

Xfwm4 flavours:
- "vulgaris" - built w/ --disable-epoxy --disable-xpresent
- "xpresent" - built w/ --disable-epoxy
- "glx"


          ACPI:  S3    S4
Xfwm:
vulgaris          +     -
xpresent          +     -
glx               +     +



Conclusion:
- S3 RESUME, no problemos
- S4 RESUME(THAW), for "vulgaris" and "xpresent",
  HW reset or Magic SysRq key sequence required.
  Not only display is garbled, but literally nothing you can do with it.
  BTW it does not matter whether compositing is on or off.

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--- Comment #37 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

dmesg - S4 RESUME(THAW) - Xfwm4 "xpresent" - when compositing turned on:

nouveau E[  PGRAPH][0000:01:00.0]  (unknown bits 0x00000080) nsource: nstatus:
nouveau E[  PGRAPH][0000:01:00.0] ch 1 [Xorg[493]] subc 0 class 0x0039 mthd
0x0100 data 0x00000000

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--- Comment #38 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
(In reply to Hans de Goede from comment #35)
> The problem is the next messages. It seems that something (not fptest
> directly) is calling glTexImage2D with a npot width / height, where as nv3x
> is not npot capable.

I've been working on getting to the bottom of this one. The NPOT problem
is only part of the story (and can be worked around I believe)

The real problem seems to be that nv3x cards only support swizzled textures
and not linear ones. This makes it sorta hard to do texture-from-pixmap.
Specifically when trying to use glXBindTexImageEXT with a local client we
end up in gallium/state_trackers/dri/dri_drawable.c: dri_set_tex_buffer2()
which calls nv30_miptree_from_handle() on the first call on a certain pixmap
and is a nop after that.
dri_set_tex_buffer2() does call drawable->update_tex_buffer() every time but
that currently is a nop

There are 2 possible solutions here:
1) Make nv30_miptree_from_handle() create a new bo rather then calling
   bo_from_handle() when called to create a texture (rather then a front /
   back buffer), and override the default nop drawable->update_tex_buffer()
   with a function calling nv30_transfer_rect to copy the linear pixmap
   data into the swizzled texture we've newly allocated
2) Solution one involves a blit, so is not going to be very fast, so
   alternatively we could simply stop claiming that GLX_EXT_texture_from_pixmap
   is supported on nv3x (it does work on nv4x already as that has support
   for linear textures)

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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--- Comment #39 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

Has there been any progress, any preliminary patch to test?

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--- Comment #40 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi All,

(In reply to Olivier Fourdan from comment #11)
> Created attachment 116536 [details]
> test program

So after some time away from this bug, I'm back onto it. The problem is that
the test program ends up using
GL_TEXTURE_2D type textures / GLX_TEXTURE_2D_EXT target, where it should be
using GL_TEXTURE_RECTANGLE_ARB.

The root cause for this seems to be that epoxy_has_glx_extension (dpy, screen,
"GL_ARB_texture_rectangle") always returns false, even though the extension is
there, as confirmed with both glxinfo and glxgears-info.

Now the extension in question is not a glx-extension, but a gl-extension, so
I've also tried calling:
epoxy_has_gl_extension ("GL_ARB_texture_rectangle") but that always returns
false too.

Simply forcing has_texture_rectangle = true to work around this (epoxy?) bug
actually results in the test program not working anywhere at all (tried both on
newer nvidia cards with nouveau and on intel gfx), not sure why. Can you
provide a version of the test program where setting has_texture_rectangle =
true actually works, or does this work for you ?

As for the fallback to GL_TEXTURE_2D / GLX_TEXTURE_2D_EXT not working on nv3x,
this is something which could likely be made to work, but that is quite a bit
of work and will be slow. I believe it would be better to first try to get
GL_TEXTURE_RECTANGLE_ARB to work, and then see if we still need to get
GL_TEXTURE_2D to work at all.

Also in the GL_TEXTURE_2D fallback path you should probably check for npot
support for 2d textures (rect textures always support npot) and if that is not
available refuse to do compositing at all.

Regards,

Hans

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--- Comment #41 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Hans de Goede from comment #40)
> Hi All,
> 
> (In reply to Olivier Fourdan from comment #11)
> > Created attachment 116536 [details]
> > test program
> 
> So after some time away from this bug, I'm back onto it. The problem is that
> the test program ends up using
> GL_TEXTURE_2D type textures / GLX_TEXTURE_2D_EXT target, where it should be
> using GL_TEXTURE_RECTANGLE_ARB.
> 
> The root cause for this seems to be that epoxy_has_glx_extension (dpy,
> screen, "GL_ARB_texture_rectangle") always returns false, even though the
> extension is there, as confirmed with both glxinfo and glxgears-info.

Er yeah, it's not a GLX ext, no reason it'd be coming up in the GLX ext list.
While similarly-named, they're entirely separate namespaces.

> 
> Now the extension in question is not a glx-extension, but a gl-extension, so
> I've also tried calling:
> epoxy_has_gl_extension ("GL_ARB_texture_rectangle") but that always returns
> false too.

That's surprising.

src/mesa/main/extensions.c:   { "GL_ARB_texture_rectangle",                  
o(NV_texture_rectangle),                    GL,             2004 },
src/mesa/state_tracker/st_extensions.c:   extensions->NV_texture_rectangle =
GL_TRUE;

So it should actually always be exposed for any st/mesa-backed dri driver
(including nv30).

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #42 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Ilia Mirkin from comment #41)
> (In reply to Hans de Goede from comment #40)
> > Hi All,
> > 
> > (In reply to Olivier Fourdan from comment #11)
> > > Created attachment 116536 [details]
> > > test program
> > 
> > So after some time away from this bug, I'm back onto it. The problem is that
> > the test program ends up using
> > GL_TEXTURE_2D type textures / GLX_TEXTURE_2D_EXT target, where it should be
> > using GL_TEXTURE_RECTANGLE_ARB.
> > 
> > The root cause for this seems to be that epoxy_has_glx_extension (dpy,
> > screen, "GL_ARB_texture_rectangle") always returns false, even though the
> > extension is there, as confirmed with both glxinfo and glxgears-info.
> 
> Er yeah, it's not a GLX ext, no reason it'd be coming up in the GLX ext
> list. While similarly-named, they're entirely separate namespaces.
> 
> > 
> > Now the extension in question is not a glx-extension, but a gl-extension, so
> > I've also tried calling:
> > epoxy_has_gl_extension ("GL_ARB_texture_rectangle") but that always returns
> > false too.
> 
> That's surprising.
> 
> src/mesa/main/extensions.c:   { "GL_ARB_texture_rectangle",                 
> o(NV_texture_rectangle),                    GL,             2004 },
> src/mesa/state_tracker/st_extensions.c:   extensions->NV_texture_rectangle =
> GL_TRUE;
> 
> So it should actually always be exposed for any st/mesa-backed dri driver
> (including nv30).

Right, so the issue is that this is done before a GL context is made current.
Fixing the code is annoying so I also just hard-coded it to be always-true. And
I also just get a gray screen now. The issue is that Redraw() doesn't account
for the fact that rect textures are non-normalized. I'm going to hack on this
for a bit.

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #43 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Created attachment 118995
  --> https://bugs.freedesktop.org/attachment.cgi?id=118995&action=edit
updated test program

With this I get the same results whether I set has_texture_rectangle = 1 or 0.
Attached the full updated source file, or use the patch below.

--- attachment.cgi?id=116536    2015-10-19 17:50:43.552881224 -0400
+++ bug-90871.c 2015-10-19 17:51:09.383618103 -0400
@@ -103,7 +103,11 @@

     glPushMatrix ();

-    glScaled (1.0, 1.0, 1.0);
+    glMatrixMode(GL_TEXTURE);
+    if (texture_type == GL_TEXTURE_RECTANGLE_ARB)
+        glScaled (pixmap_width, pixmap_height, 1.0);
+    else
+        glScaled (1.0, 1.0, 1.0);
     glTranslated (0.0, 0.0, 0.0);

     glBegin (GL_QUADS);
@@ -147,8 +151,8 @@
     int fb_match;
     VisualID xvisual_id;

-    has_texture_rectangle =
-        epoxy_has_glx_extension (dpy, screen, "GL_ARB_texture_rectangle");
+    has_texture_rectangle = 1; /*
+        epoxy_has_gl_extension ("GL_ARB_texture_rectangle");*/
     if (has_texture_rectangle)
     {
         printf ("Using texture type GL_TEXTURE_RECTANGLE_ARB\n");

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--- Comment #44 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi Ilia,

(In reply to Ilia Mirkin from comment #43)
> Created attachment 118995 [details]
> updated test program
> 
> With this I get the same results whether I set has_texture_rectangle = 1 or
> 0. Attached the full updated source file, or use the patch below.

Thanks for the updated test program, this seems to fix things on nv3x. There
still is an issue with then test program though (also reproduced on intel gfx)
the program is supposed to change the color of the "box" when you click a mouse
button (pressing a key exits the program), but currently when using rectangle
textures it draws a red box on startup and then on a mouse click everything
goes gray, where as the box should turn blue. As said this happens on intel gfx
too, so I think there still is an issue with the test program when using
rectangle textures.

As for epoxy not seeing the extension, I believe that that is an epoxy issue,
as said the extension is clearly listed in both glxinfo and glxgears -info
output.

Regards,

Hans

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--- Comment #45 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

Check out with latest and greatest - epoxy:
http://goo.gl/Gm4ffO
glx/

libepoxy 1.3.1 git b3b8bd9 - 20150929
https://github.com/yaronct/libepoxy

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #46 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Hans de Goede from comment #44)
> Hi Ilia,
> 
> (In reply to Ilia Mirkin from comment #43)
> > Created attachment 118995 [details]
> > updated test program
> > 
> > With this I get the same results whether I set has_texture_rectangle = 1 or
> > 0. Attached the full updated source file, or use the patch below.
> 
> Thanks for the updated test program, this seems to fix things on nv3x. There
> still is an issue with then test program though (also reproduced on intel
> gfx) the program is supposed to change the color of the "box" when you click
> a mouse button (pressing a key exits the program), but currently when using
> rectangle textures it draws a red box on startup and then on a mouse click
> everything goes gray, where as the box should turn blue. As said this
> happens on intel gfx too, so I think there still is an issue with the test
> program when using rectangle textures.

Just my incompetence -- glMatrixMode has to go *before* glPushMatrix, not
after. Oops. Moving it up makes the program behave as expected, at least on
intel/hsw.

> 
> As for epoxy not seeing the extension, I believe that that is an epoxy
> issue, as said the extension is clearly listed in both glxinfo and glxgears
> -info output.

Pretty sure it's what I said -- the test program doesn't do a glXMakeCurrent
before calling gl functions, which means their output is invalid. Not an epoxy
issue. Rearranging the test program's code to fix this is annoying though.

I wonder if this is a real issue in xfwm code as well.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #47 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
(In reply to Ilia Mirkin from comment #46)
> Just my incompetence

Mine, rather.

> glMatrixMode has to go *before* glPushMatrix, not
> after. Oops. Moving it up makes the program behave as expected, at least on
> intel/hsw.
> 
> Pretty sure it's what I said -- the test program doesn't do a glXMakeCurrent
> before calling gl functions, which means their output is invalid. Not an
> epoxy issue. Rearranging the test program's code to fix this is annoying
> though.

No it's not, if the test program is invalid, it ought to be fixed.

> I wonder if this is a real issue in xfwm code as well.

Yes, most likely. This code is still early beta in xfwm4. I'll try to fix it
and Poma will be able to test I guess.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #48 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Olivier Fourdan from comment #47)
> (In reply to Ilia Mirkin from comment #46)
> > Pretty sure it's what I said -- the test program doesn't do a glXMakeCurrent
> > before calling gl functions, which means their output is invalid. Not an
> > epoxy issue. Rearranging the test program's code to fix this is annoying
> > though.
> 
> No it's not, if the test program is invalid, it ought to be fixed.
> 
> > I wonder if this is a real issue in xfwm code as well.
> 
> Yes, most likely. This code is still early beta in xfwm4. I'll try to fix it
> and Poma will be able to test I guess.

The main reason why it's annoying to fix in the test program is that you use
that knowledge for selecting fbconfigs... which you need to do before making a
context current. Now you could either (a) do a 2-step process whereby you first
see if the ext is there, and then go and select another config or (b) make the
assumption that rect support is an all-or-nothing thing -- either no configs
have it or they all do, so no need to check it when evaluating fbconfig
validity.

I'm moderately sure that'd be a valid assumption.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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https://bugs.freedesktop.org/show_bug.cgi?id=90871

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #49 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Olivier Fourdan from comment #47)
> Yes, most likely. This code is still early beta in xfwm4. I'll try to fix it
> and Poma will be able to test I guess.

Looking at http://git.xfce.org/xfce/xfwm4/tree/src/compositor.c, you have at
least the following issues:

    screen_info->has_texture_rectangle =
        epoxy_has_glx_extension (myScreenGetXDisplay (screen_info),
                                 screen_info->screen,
                                 "GL_ARB_texture_rectangle");

    screen_info->has_texture_non_power_of_two =
        epoxy_has_glx_extension (myScreenGetXDisplay (screen_info),
                                 screen_info->screen,
                                 "GL_ARB_texture_non_power_of_two");

These are not GLX exts, they are GL exts, so you have to use
epoxy_has_gl_extension. However you have to make sure that a GL context is
active (i.e. glXMakeCurrent) before trying to do epoxy_has_gl_extension.

redraw_glx_texture -- this needs to add a width/height scale to the GL_TEXTURE
matrix for rect textures, since they use non-normalized coordinates. This
probably never came up before since the checks above didn't succeed.

If you don't have has_texture_rectangle *and* you don't have
has_texture_non_power_of_two that means that you can only use POT sized pixmaps
with GL_TEXTURE_2D. Probably not worth supporting that. AFAIK ~every driver
supports ARB_texture_rectangle... except seemingly nv04 (but nv10+ has it).

Marking this as NOTOURBUG for now, if issues persist, feel free to open a new
issue.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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--- Comment #50 from Olivier Fourdan <fourdan-eaOCjQ5FDoY@public.gmane.org> ---
Many thanks.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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--- Comment #51 from Hans de Goede <jwrdegoede-rxtnV0ftBwyoClj4AeEUq9i2O/JbrIOy@public.gmane.org> ---
Hi,

(In reply to Ilia Mirkin from comment #48)
> or (b) make the assumption that rect support is an all-or-nothing thing -- either
> no configs have it or they all do, so no need to check it when evaluating
> fbconfig validity.

To be clear what Ilia is suggesting here (I believe) is to drop the entire
check for GL_ARB_texture_rectangle and instead only check the
GLX_TEXTURE_RECTANGLE_BIT_EXT bit in the value returned for
GLX_BIND_TO_TEXTURE_TARGETS_EXT, and if that is not set then check for
GLX_TEXTURE_2D_BIT_EXT

I agree with Ilia that this should work fine and should fix the detection
problem. Actually I was discussing this bug with Ben Skeggs a couple of day ago
and he suggested to do exactly this.

I can also confirm that with the glPushMatrix call in the right place, and the
rectangle support detection fixed things work fine on a nv34 card.

Regards,

Hans

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poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|NOTOURBUG                   |---

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--- Comment #52 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Can it be tested before it is closed. What's the rush.

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[Bug 90871] NV30: Xfwm4 use_compositing - garbled display

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Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #53 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to poma from comment #52)
> Can it be tested before it is closed. What's the rush.

Hans confirmed. It's an application bug, which means this one is just
cluttering up bug lists. Nothing to be done wrt nouveau here.

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--- Comment #54 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Thank you for your time dudes.

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poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|NOTOURBUG                   |---

--- Comment #55 from poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

https://bugzilla.xfce.org/show_bug.cgi?id=11962#c27

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Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #56 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to poma from comment #55)
> https://bugzilla.xfce.org/show_bug.cgi?id=11962#c27

Please open new bugs when you have new issues. This is an issue introduced in
4.3. See https://bugzilla.kernel.org/show_bug.cgi?id=106431 for the discussion
and patch links.

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