* [Bug 108095] Window becomes partially transparent for short time
2018-09-28 12:50 [Bug 108095] Window becomes partially transparent for short time bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Please attach the corresponding Xorg log file and the outputs of dmesg and
glxinfo.
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #2 from Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de> ---
Created attachment 141778
--> https://bugs.freedesktop.org/attachment.cgi?id=141778&action=edit
Linux 4.14.55 messages
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #3 from Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de> ---
Created attachment 141779
--> https://bugs.freedesktop.org/attachment.cgi?id=141779&action=edit
/var/log/gdm/:0.log
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #4 from Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de> ---
Created attachment 141818
--> https://bugs.freedesktop.org/attachment.cgi?id=141818&action=edit
Output of `glxinfo`
Please find the output of `glxinfo` attached. Here is an excerpt.
```
Extended renderer info (GLX_MESA_query_renderer):
Vendor: X.Org (0x1002)
Device: AMD Radeon Pro WX3100 (POLARIS12, DRM 3.19.0, 4.14.55.mx64.224,
LLVM 6.0.1) (0x6985)
Version: 18.1.6
Accelerated: yes
Video memory: 4096MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.5
Max compat profile version: 3.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
```
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
Does restarting xfwm4 with any of these arguments make a difference?
xfwm4 --replace --vblank=off
xfwm4 --replace --vblank=glx
xfwm4 --replace --vblank=xpresent
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #6 from Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de> ---
(In reply to Michel Dänzer from comment #5)
> Does restarting xfwm4 with any of these arguments make a difference?
>
> xfwm4 --replace --vblank=off
> xfwm4 --replace --vblank=glx
> xfwm4 --replace --vblank=xpresent
The user wasn’t able to reproduce the problem with `xfwm4 --replace
--vblank=off` yet. Should he also test the other suggestions nevertheless?
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #7 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Paul Menzel from comment #6)
> The user wasn’t able to reproduce the problem with `xfwm4 --replace
> --vblank=off` yet. Should he also test the other suggestions nevertheless?
Yes, please. It'll be valuable to know if it happens with both of the other
ones, or only one of them.
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
--- Comment #8 from Paul Menzel <pmenzel+bugs.freedesktop.org@molgen.mpg.de> ---
libXpresent was not installed here, so xfwm didn’t have support for it.
```
$ xfwm4 --version
This is xfwm4 version 4.13.1 (revision 942156e4) for Xfce 4.12
Released under the terms of the GNU General Public License.
Compiled against GTK+-3.22.30, using GTK+-3.22.30.
Build configuration and supported features:
- Startup notification support: Yes
- XSync support: Yes
- Render support: Yes
- Xrandr support: Yes
- Xpresent support: No
- Embedded compositor: Yes
- Epoxy support: Yes
- KDE systray proxy (deprecated): No
```
Installing libXpresent and rebuilding xfwm, the report that everything works
now.
As I do not know the dependencies between all components, I cannot say, that
it’s really no driver bug.
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https://bugs.freedesktop.org/show_bug.cgi?id=108095
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|DRI git |git
Product|DRI |Mesa
Component|DRM/AMDgpu |GLX
QA Contact| |mesa-dev@lists.freedesktop.
| |org
Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
I think this is because the glXWaitX implementation in Mesa isn't reliable.
xfwm4 relies on it to synchronize between X11 protocol drawing to a pixmap and
sampling from an OpenGL texture bound to the corresponding GLXPixmap via
GLX_EXT_texture_from_pixmap.
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