[Bug 62914] New: ZaphodHeads doesn't work after upgrading to xorg 1.14

[Bug 62914] New: ZaphodHeads doesn't work after upgrading to xorg 1.14

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

          Priority: medium
            Bug ID: 62914
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: ZaphodHeads doesn't work after upgrading to xorg 1.14
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

CASE 1 (MAIN):

My 2 GPUs, 3 monitors setup stopped working after upgrading xorg to 1.14. I
guess we should blame xorg as the same happened with 1.13 version.
https://bugs.freedesktop.org/show_bug.cgi?id=56347
I tried using upstream nouveau as well.

[2013-03-29 16:43] upgraded xf86-video-nouveau (1.0.6-1 -> 1.0.7-1)
[2013-03-29 16:43] upgraded xorg-server (1.13.2.901-1 -> 1.14.0-2)

Backtrace from upstream nouveau, commit
6771424d79e541d2fa7253a582db3dc9108fd97d.

[  2312.187] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x58a846]
[  2312.187] (EE) 1: /usr/bin/X (0x400000+0x18e669) [0x58e669]
[  2312.187] (EE) 2: /usr/lib/libpthread.so.0 (0x7f1738fa2000+0xf1e0)
[0x7f1738fb11e0]
[  2312.187] (EE) 3: /usr/local/lib/xorg/modules/drivers/nouveau_drv.so
(0x7f1733dc0000+0x25e30) [0x7f1733de5e30]
[  2312.187] (EE) 4: /usr/bin/X (xf86CrtcSetModeTransform+0x14d) [0x4ae31d]
[  2312.187] (EE) 5: /usr/bin/X (xf86SetDesiredModes+0x1b8) [0x4aeb58]
[  2312.187] (EE) 6: /usr/local/lib/xorg/modules/drivers/nouveau_drv.so
(0x7f1733dc0000+0xe7d1) [0x7f1733dce7d1]
[  2312.188] (EE) 7: /usr/local/lib/xorg/modules/drivers/nouveau_drv.so
(0x7f1733dc0000+0xf126) [0x7f1733dcf126]
[  2312.188] (EE) 8: /usr/bin/X (0x400000+0xabbae) [0x4abbae]
[  2312.188] (EE) 9: /usr/bin/X (0x400000+0x2674d) [0x42674d]
[  2312.188] (EE) 10: /usr/lib/libc.so.6 (__libc_start_main+0xf5)
[0x7f1737e2ea15]
[  2312.188] (EE) 11: /usr/bin/X (0x400000+0x26bdd) [0x426bdd]

Can you please investigate what could cause the error?

I took a look at other projects reporting xorg 1.14 fails, maybe this has
something to do with my nouveau problem? Just a guess.
- https://bugs.freedesktop.org/show_bug.cgi?id=62112
- https://bugs.freedesktop.org/show_bug.cgi?id=62773

Files:
- full log:
  http://upload.nowaker.net/nwkr/1364581970_Xorg.0.log-HEAD
- my xorg.conf.3monitors - the same for two years:
  http://wklej.org/id/555276/txt/ 


CASE 2 (AUX):

When falling back to my 1 GPUs, 2 monitors setup with ZaphodHeads, I get only
one monitor working. That may be interesting:

[  2345.932] (EE) NOUVEAU(1): [drm] failed to set drm interface version.
[  2345.932] (EE) NOUVEAU(1): [drm] error opening the drm
[  2345.932] (EE) NOUVEAU(1): 820: 

Files:
- full log:
  http://upload.nowaker.net/nwkr/1364582818_Xorg.0.log-2monitors
- my xorg.conf.2monitors:
  http://upload.nowaker.net/nwkr/1364582578_xorg.conf.2monitory


As usual, patches will be appreciated - I will test.
My environment: Arch Linux, kernel 3.8.4-1-ARCH.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #1 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
To be clear, the message "failed to set drm interface version" appears in CASE
1 as well. That's why these two cases are considered one bug.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #2 from Maxim P. Dementiev <max-sDaPYKTrDkuHXe+LvDLADg@public.gmane.org> ---
I've got the same problem.

X.Org X Server 1.13.1
Release Date: 2012-12-13
[  6286.574] X Protocol Version 11, Revision 0
[  6286.574] Build Operating System: Linux 3.6.11-gentoo x86_64 Gentoo
[  6286.575] Current Operating System: Linux vaio 3.7.10-gentoo #1 SMP Sun Mar
17 20:02:26 MSK 2013 x86_64
[  6286.575] Kernel command line: root=/dev/sda2
[  6286.576] Build Date: 16 February 2013  12:46:40AM
[  6286.576]  
[  6286.577] Current version of pixman: 0.28.0
.....
[  6286.581] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[  6286.581] (==) ServerLayout "MyLayout"
[  6286.581] (**) |-->Screen "LCDScreen" (0)
[  6286.581] (**) |   |-->Monitor "MyVaioLCD"
[  6286.581] (**) |   |-->Device "NvidiaLCD"
[  6286.581] (**) |-->Screen "FlatronScreen" (1)
[  6286.581] (**) |   |-->Monitor "MyFlatron"
[  6286.581] (**) |   |-->Device "NvidiaCRT"
[  6286.581] (**) Option "Xinerama" "1"
.....
[  6286.582] (II) Module ABI versions:
[  6286.582]     X.Org ANSI C Emulation: 0.4
[  6286.582]     X.Org Video Driver: 13.1
[  6286.582]     X.Org XInput driver : 18.0
[  6286.582]     X.Org Server Extension : 7.0
[  6286.583] (II) config/udev: Adding drm device (/dev/dri/card0)
[  6286.585] (--) PCI:*(0:1:0:0) 10de:0a75:104d:9067 rev 162, Mem @
0xe2000000/16777216, 0xd0000000/268435456, 0xe0000000/33554432, I/O @
0x0000d000/128, BIOS @ 0x????????/524288
[  6286.585] (II) Open ACPI successful (/var/run/acpid.socket)
.....
[  6286.597] (II) Module glx: vendor="X.Org Foundation"
[  6286.597]     compiled for 1.13.1, module version = 1.0.0
[  6286.597]     ABI class: X.Org Server Extension, version 7.0
[  6286.597] (==) AIGLX enabled
[  6286.598] Loading extension GLX
[  6286.598] (II) LoadModule: "nouveau"
[  6286.598] (II) Loading /usr/lib64/xorg/modules/drivers/nouveau_drv.so
[  6286.598] (II) Module nouveau: vendor="X.Org Foundation"
[  6286.598]     compiled for 1.13.1, module version = 1.0.6
[  6286.598]     Module class: X.Org Video Driver
[  6286.598]     ABI class: X.Org Video Driver, version 13.1
[  6286.598] (II) NOUVEAU driver 
.....
[  6286.598] (--) using VT number 7

[  6286.600] (II) [drm] nouveau interface version: 1.1.0
[  6286.600] (II) [drm] nouveau interface version: 1.1.0
[  6286.600] (II) Loading sub module "dri"
[  6286.600] (II) LoadModule: "dri"
[  6286.600] (II) Module "dri" already built-in
[  6286.600] (II) NOUVEAU(0): Loaded DRI module
[  6286.600] (--) NOUVEAU(0): Chipset: "NVIDIA NVa8"
[  6286.601] (**) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32
[  6286.601] (==) NOUVEAU(0): RGB weight 888
[  6286.601] (==) NOUVEAU(0): Default visual is TrueColor
[  6286.601] (**) NOUVEAU(0): Option "ZaphodHeads" "LVDS-1,VGA-1"
[  6286.601] (==) NOUVEAU(0): Using HW cursor
[  6286.601] (==) NOUVEAU(0): GLX sync to VBlank disabled.
[  6286.601] (==) NOUVEAU(0): Page flipping enabled
[  6286.601] (==) NOUVEAU(0): Swap limit set to 2 [Max allowed 2]
[  6286.646] (II) NOUVEAU(0): Output LVDS-1 using monitor section MyVaioLCD
[  6286.646] (**) NOUVEAU(0): Option "Enable" "true"
[  6286.685] (II) NOUVEAU(0): Output VGA-1 using monitor section MyFlatron
[  6286.685] (**) NOUVEAU(0): Option "Enable" "true"
[  6286.689] (II) NOUVEAU(0): EDID for output LVDS-1
[  6286.689] (II) NOUVEAU(0): Manufacturer: SNY  Model: 6fa  Serial#: 0
.....
[  6286.729] (II) NOUVEAU(0): Output LVDS-1 enabled by config file
[  6286.729] (II) NOUVEAU(0): Output VGA-1 enabled by config file
[  6286.729] (II) NOUVEAU(0): Using exact sizes for initial modes
[  6286.729] (II) NOUVEAU(0): Output LVDS-1 using initial mode 1600x900
[  6286.729] (II) NOUVEAU(0): Output VGA-1 using initial mode 1600x900
.....
[  6286.730] (II) Module shadowfb: vendor="X.Org Foundation"
[  6286.730]     compiled for 1.13.1, module version = 1.0.0
[  6286.730]     ABI class: X.Org ANSI C Emulation, version 0.4
[  6286.730] (II) Loading sub module "dri"
[  6286.730] (II) LoadModule: "dri"
[  6286.730] (II) Module "dri" already built-in
[  6286.730] (II) NOUVEAU(1): Loaded DRI module
[  6286.730] (EE) NOUVEAU(1): [drm] failed to set drm interface version.
[  6286.730] (EE) NOUVEAU(1): [drm] error opening the drm
[  6286.730] (EE) NOUVEAU(1): 819: 
[  6286.730] (II) UnloadModule: "nouveau"
[  6286.730] (--) Depth 24 pixmap format is 32 bpp
[  6286.733] (II) NOUVEAU(0): Opened GPU channel 0
[  6286.747] (II) NOUVEAU(0): [DRI2] Setup complete
[  6286.747] (II) NOUVEAU(0): [DRI2]   DRI driver: nouveau
[  6286.747] (II) NOUVEAU(0): [DRI2]   VDPAU driver: nouveau
[  6286.750] (II) EXA(0): Driver allocated offscreen pixmaps

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #3 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
OK, so it looks like this time it's DRM to blame, not xorg 1.14.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #4 from Maxim P. Dementiev <max-sDaPYKTrDkuHXe+LvDLADg@public.gmane.org> ---
I've upgraded x11-drivers/xf86-video-nouveau from 1.0.6 to 1.0.7, the result is
still the same.

How can I find (or refine) the reason?

About the kernel:
/usr/src/linux-3.7.10-gentoo/drivers/gpu/drm/nouveau/nouveau_drm.h:#define
DRIVER_DATE        "20120801"

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #5 from Maxim P. Dementiev <max-sDaPYKTrDkuHXe+LvDLADg@public.gmane.org> ---
Unfortunately, I cannot use stand-alone drm module with my 3.7.10 kernel:

/var/tmp/portage/x11-base/nouveau-drm-20121015/work/master/drivers/gpu/drm/drm_gem.c:
In function ‘drm_gem_mmap’:
/var/tmp/portage/x11-base/nouveau-drm-20121015/work/master/drivers/gpu/drm/drm_gem.c:709:19:
error: ‘VM_RESERVED’ undeclared (first use in this function)
/var/tmp/portage/x11-base/nouveau-drm-20121015/work/master/drivers/gpu/drm/drm_gem.c:709:19:
note: each undeclared identifier is reported only once for each function it
appears in

New 3.8.7 kernel contains the same version of drm:

/usr/src/linux-3.7.10-gentoo/drivers/gpu/drm/nouveau/nouveau_drm.h:#define
DRIVER_DATE        "20120801"
/usr/src/linux-3.8.7-gentoo/drivers/gpu/drm/nouveau/nouveau_drm.h:#define
DRIVER_DATE        "20120801"

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #6 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
A _very_ wild guess - this is an existing drm race bug, exposed with recent X
work

Keep xf86-video-nouveau (ddx) at 1.0.7, and bisect X
Note you may need to rebuild the ddx as well

Thanks

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #7 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
Any instructions on how to "bisect X"? I have no idea what you meant. :)

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #8 from Vincent Pelletier <plr.vincent-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
> Any instructions on how to "bisect X"?

http://git-scm.com/docs/git-bisect
http://git-scm.com/book/en/Git-Tools-Debugging-with-Git#Binary-Search

A bit farther (helped me for my first bisect, maybe it's just redundant with
above project-agnostic docs):
http://wiki.winehq.org/RegressionTesting

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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--- Comment #9 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Can reproduce the issue but there is no "good" combination on my system, i.e.
any combination of 

xf86-video-nouveau -> 1.0.6-1  1.0.7-1
xorg-server -> 1.13.2.901-1  1.14.0-2

produces "Failed to set drm interface version"


In terms of "how to bisect" the links provided are quite nice
Although I would suggest to confirm which package exactly caused the issue,
before jumping into blind bisection

1. Revert xorg-server to previous version (1.13.2.901-1)
2. Keep xf86-video-nouveau 1.0.7-1, but rebuild it on top of the old/good
xserver

and vice versa

Note: to avoid rebuilding the input drivers have SSH handy and observe Xorg.log
for the offending lines

Note: if unsure about the specific build options, patches and others take a
look at the distro packaging system

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #10 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Dave pushed a fix for the issue


commit d3b52efe959f255784f5ead16d7276ca0fb4cdb1
Author: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Date:   Mon May 13 13:35:12 2013 +1000

    nouveau: attempt to fix zaphod since dri1 code removal

    j_v on #nouveau bisected b1a630b48210d6a3c44994fce1b73273000ace5c has
    breaking zaphod, on review it was trying to open the drm fd a second time
    which was unnecessary.

    Avoid the problem by storing the nv fd in an entity and have share it
between
    the two scrn info recs.

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--- Comment #11 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
I will validate it today.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #12 from MasterPrenium-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org ---
Dear guys,

I had the same issue on an NV80 GPU card.

I've just tried your patch, it's a little bit better (I can see this kind
[  4957.508] (II) NOUVEAU(1): Output DVI-I-2 connected)

Which is great and better than before, but now I've a segfault ...

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #13 from MasterPrenium-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org ---
Created attachment 79294
  --> https://bugs.freedesktop.org/attachment.cgi?id=79294&action=edit
My Xorg.log

Here is my Xorg.log for the segfault ...

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #14 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
At quick look at your log indicates another issue

  (EE) AIGLX error: Calling driver entry point failed

Please open another bug with more information [1]

Cheers
Emil

[1] http://nouveau.freedesktop.org/wiki/Bugs/

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> changed:

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

--- Comment #15 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
The fix didn't work for me. I get the very same exception as in my first
comment (titled CASE 1). Using bf72ae1f6574c540f0afc2d7845d41df43507a8f.

2013-05-19 log: http://upload.nowaker.net/nwkr/1368964535_Xorg.0.log
2013-03-29 log: http://upload.nowaker.net/nwkr/1364581970_Xorg.0.log-HEAD

Indeed MasterPremium's error is a different issue. I have never had such a
message.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #16 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Two separate issues in a single bug report :P

AFAICS the patch did resolve the second issue, although the first one seems
quite specific to your system/setup

There are two fronts you can take to tackle this

1. Carry on with a bisection - first with xf86-video-nouveau and after that
with any other package that was updated when the breakage occured

2. Bisect your xorg.conf, see which line(s) are causing the issue


I would recommend you try them in the order in which they are listed

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #17 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
I am too weak to do this bisect thing. Maybe when I invite my hacker-friend for
a beer I will manage to do that. ;-) But I took a look at `git log` and checked
out 27a1a0616304e9b9f0ae842899b7d614f1026578 (which is actually your fix for my
#56347), compiled and... it works! Will this info help you to figure out what
actually happened?

Arch Linux 20130519
xorg-server 1.14.1-1
libdrm 2.4.45-1

A complete list of all X/drm/dri-related packages: http://wklej.org/id/1042829/

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #18 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
An alternative to bisecting: you know where the crash is, it's at

[   360.877] (EE) 3: /usr/local/lib/xorg/modules/drivers/nouveau_drv.so
(0x7f24ae751000+0x255c0) [0x7f24ae7765c0]
[   360.877] (EE) 4: /usr/bin/X (xf86CrtcSetModeTransform+0x12a) [0x4aad4a]

So load up nouveau_drv.so in gdb (gdb
/usr/local/lib/xorg/modules/drivers/nouveau_drv.so)

And inside gdb, run

disassemble 0x255c0

That should tell you what function it's dying in, and the exact instructions
it's dying on. This is what I did for bug 63263 (see my initial comment there),
and that was able to pinpoint the crash exactly. (Of course figuring out the
circumstances that lead to that condition can be trickier to work out.)

You can also compile the whole thing with -g, e.g. ./configure CFLAGS=-g or
something like that. And make sure that the final thing isn't stripped. That
might make gdb more cooperative if you're having trouble.

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #19 from Damian Nowak <nowaker-qMBiBlq7xnnVItvQsEIGlw@public.gmane.org> ---
@Ilia, thanks for suggestions. Leaving debug symbols sounds good. Will check it
soon.

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

--- Comment #20 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Hi,

I was getting the "[drm] error opening the drm" error, which is what led me to
this bug, and d3b52efe solves it for me too. I think the crash is a different
error as the "error opening the drm" error existed even on 1.0.4 whereas that
version didn't have the crash.

Having said that, I'm getting the crash too and have got some of the
information you've asked for so. seeing it's already been discussed on this
bug, I'll go ahead and post it here.

git bisect led me to this commit:


commit 1fdd7db94b55c65ea62cc9eaefff620b20e9e4ea
Author: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Date:   Mon Jan 7 15:28:53 2013 +1000

    nouveau: add reverse prime support

    This allows the nvidia card to scanout Intel cards rendering.

    Signed-off-by: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>


It didn't revert cleanly against master and how to fix the conflict wasn't
clear to me so I haven't been able to test that.

The disassemble points to the function drmmode_set_mode_major. I'll attach that
output, along with my Xorg.0.log after this.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #21 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 80077
  --> https://bugs.freedesktop.org/attachment.cgi?id=80077&action=edit
My Xorg.0.log

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #22 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 80078
  --> https://bugs.freedesktop.org/attachment.cgi?id=80078&action=edit
disassemble of segfault location

Backtrace:
disassemble 0x263f7 taken from frame 3 below

0: /usr/bin/X (xorg_backtrace+0x36) [0x53ccca]
1: /usr/bin/X (0x400000+0x13fe6b) [0x53fe6b]
2: /lib64/libpthread.so.0 (0x7f89dcbe8000+0x11070) [0x7f89dcbf9070]
3: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7f89da6e0000+0x263f7)
[0x7f89da7063f7]
4: /usr/bin/X (xf86CrtcSetModeTransform+0x14f) [0x493916]
5: /usr/bin/X (xf86SetDesiredModes+0x251) [0x493fb4]
6: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7f89da6e0000+0xee51)
[0x7f89da6eee51]
7: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7f89da6e0000+0xf78e)
[0x7f89da6ef78e]
8: /usr/bin/X (0x400000+0x91c1e) [0x491c1e]
9: /usr/bin/X (0x400000+0x29362) [0x429362]
10: /lib64/libc.so.6 (__libc_start_main+0xed) [0x7f89db89464d]
11: /usr/bin/X (0x400000+0x29779) [0x429779]

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #23 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to comment #20)
> commit 1fdd7db94b55c65ea62cc9eaefff620b20e9e4ea
> Author: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> Date:   Mon Jan 7 15:28:53 2013 +1000
> 
> It didn't revert cleanly against master and how to fix the conflict wasn't
> clear to me so I haven't been able to test that.

I spoke too soon. Reverting was as easy as deleting all the additions, whereas
I was confused in thinking that the additions needed to be kept.

So, to cut a long story short, HEAD with the above patch reverted works for me.

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[Bug 62914] ZaphodHeads doesn't work after upgrading to xorg 1.14

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #24 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Could you post the disassembly of the function? Would like to see exactly where
in that method it's dying. (I wonder if it's crtc->randr_crtc... something with
a 0x2d0 struct offset.)

Also, the latest version of that code has added a #ifdef NOUVEAU_PIXMAP_SHARING
around the added code in drmmode_set_mode_major... (which I assume you've tried
running as well). What happens if you just remove that whole ifdef? (But leave
the rest of the commit in.)

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #25 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 80079
  --> https://bugs.freedesktop.org/attachment.cgi?id=80079&action=edit
Disassembly of drmmode_set_mode_major

This is taken running rev 1fdd7db94b55c65ea62cc9eaefff620b20e9e4ea

The segfault happens in:

349             if (crtc->randr_crtc->scanout_pixmap)
   0x00000000000263e2 <+498>:   mov    0x1b8(%rbp),%rax
   0x00000000000263e9 <+505>:   xor    %ecx,%ecx
   0x00000000000263eb <+507>:   xor    %r8d,%r8d
   0x00000000000263f7 <+519>:   cmpq   $0x0,0x2d0(%rax)
   0x00000000000263ff <+527>:   je     0x264f0 <drmmode_set_mode_major+768>

350                     x = y = 0;


HEAD with the patch reverted and #ifdef'd chunks removed succeeds, but patch
reverted and #ifdef'd chunks kept (and a func declaration added) failed.
Testing a pristine HEAD with the #ifdef'd chunks removed also succeeds.

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #26 from Jason Stubbs <jasonbstubbs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Just so you don't think I've fallen off the face of the earth, I'm about to go
home for the weekend and I can only reproduce the issue on my work PC (the only
place I'm lucky enough to have three monitors!) so I won't be able to test
again until Monday.

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

--- Comment #27 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
So the faulting address is

0x00000000000263f7 <+519>:   cmpq   $0x0,0x2d0(%rax)

Which means that crtc->randr_crtc is NULL (and ->scanout_pixmap is 0x2d0 bytes
into the structure).

Hopefully this should provide enough info to someone more knowledgeable than
myself to figure out what's going on.

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https://bugs.freedesktop.org/show_bug.cgi?id=62914

Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

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

--- Comment #28 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Guys plese try xf86-video-nouveau 1.0.9
It contains the following patch which should handle the crtc->randr_crtc ==
NULL case as spotted by Ilia

commit be44e7804862b4c276ed4d4717b1212920f428e6
Author: Dave Airlie <airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date:   Tue Jul 30 15:26:46 2013 +1000

    nouveau: fix crash when xinerama is enabled.

    Signed-off-by: Dave Airlie <airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>

Closing for now

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