Bug#623864: xserver-xorg-video-intel: Segfaults when running screensaver with composition enabled

[Julien Cristau <jcristau@debian.org>]

reassign 623864 libgl1-mesa-dri
tag 623864 moreinfo
kthxbye

On Sat, Apr 23, 2011 at 22:23:59 +0200, Jarek Kamiński wrote:

> Package: xserver-xorg-video-intel
> Version: 2:2.15.0-1
> Severity: normal
> 
> Hi.
> 
> 2.15 version of drivers segfaults upon starting GL screensaver when
> composition is enabled in kwin. With composition disabled, everything
> works fine. If that matters, I have plasma overlay enabled (plasmoids
> are drawn on top of GL screensaver; with composition disabled only
> plasmoids are shown).
> 
> Xorg.0.log.old says:
> #v+
> [ 14765.132] 
> Backtrace:
> [ 14765.132] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80edefb]
> [ 14765.132] 1: /usr/bin/X (0x8048000+0x58915) [0x80a0915]
> [ 14765.132] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xf770d410]
> [ 14765.132] 3: /usr/lib/dri/i965_dri.so (0xf6fc0000+0x556e7) [0xf70156e7]
> [ 14765.132] 4: /usr/lib/dri/i965_dri.so (0xf6fc0000+0x43b3e) [0xf7003b3e]
> [ 14765.132] 5: /usr/lib/dri/i965_dri.so (0xf6fc0000+0x13770c) [0xf70f770c]
> [ 14765.132] 6: /usr/lib/xorg/modules/extensions/libglx.so (0xf75d4000+0x39c11) [0xf760dc11]
> [ 14765.132] 7: /usr/lib/xorg/modules/extensions/libglx.so (0xf75d4000+0x34ff4) [0xf7608ff4]
> [ 14765.132] 8: /usr/lib/xorg/modules/extensions/libglx.so (0xf75d4000+0x37aff) [0xf760baff]
> [ 14765.132] 9: /usr/bin/X (0x8048000+0x3b057) [0x8083057]
> [ 14765.132] 10: /usr/bin/X (0x8048000+0x1e695) [0x8066695]
> [ 14765.132] 11: /lib/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x4abd6c76]
> [ 14765.132] 12: /usr/bin/X (0x8048000+0x1e271) [0x8066271]
> [ 14765.132] Segmentation fault at address (nil)
> [ 14765.132] 
> Fatal server error:
> [ 14765.132] Caught signal 11 (Segmentation fault). Server aborting
> [ 14765.132] 
> [ 14765.132] 
> Please consult the The X.Org Foundation support 
> 	 at http://wiki.x.org
>  for help. 
> [ 14765.132] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
> [ 14765.132] 
> #v-
> 
> Full backtrace from gdb attached.
> 
> 2.13 worked fine. 2.14 have similar issues to 2.15, but I didn't manage
> to find time to debug this. I can generate backtrace for 2.14 if that
> may help.
> 
Two questions:
- why are you using indirect rendering?
- is this still reproducible with an updated stack, including mesa 7.11?
  If yes please file a bug upstream according to
  http://intellinuxgraphics.org/how_to_report_bug.html including an
  updated gdb backtrace.

Thanks,
Julien