Bug#604897: xserver-xorg-core: Segmentation fault on Squeeze with radeon

[Michel Dänzer <daenzer@debian.org>]

On Don, 2010-11-25 at 09:11 +0100, Tobias Nissen wrote: 
> Package: xserver-xorg-core
> Version: 2:1.7.7-9
> Severity: important
> 
> After my routine `aptitude safe-upgrade` two days ago I noticed, that I was
> unable to playback flash videos in fullscreen. Since some X-component had
> been upgraded I restarted GDM. After that X didn't start anymore at all.
> The log then showed this:
> 
> Backtrace:
> 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80adebb]
> 1: /usr/bin/X (0x8048000+0x5aa95) [0x80a2a95]
> 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb786740c]
> 3: /usr/lib/xorg/modules/extensions/libglx.so (0xb7421000+0x3fc24) [0xb7460c24]
> 4: /usr/lib/xorg/modules/extensions/libglx.so (0xb7421000+0x364f2) [0xb74574f2]
> 5: /usr/bin/X (InitExtensions+0x85) [0x80cb3a5]
> 6: /usr/bin/X (0x8048000+0x1e80d) [0x806680d]
> 7: /lib/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0xb759bc76]
> 8: /usr/bin/X (0x8048000+0x1e5a1) [0x80665a1]
> Segmentation fault at address (nil)
> 
> Fatal server error:
> Caught signal 11 (Segmentation fault). Server aborting
> 
> I then copied all files from my backup at /usr/lib/xorg/modules/extensions to
> the running system and restarted X -- now it works again. I think something is
> wrong with libglx.so.

[...]

> Versions of packages xserver-xorg-core recommends:
> ii  libgl1-mesa-dri             7.9+repack-1 A free implementation of the OpenG

[...]

> [UPGRADE] libgl1-mesa-dri 7.8.2-2 -> 7.9+repack-1

Does downgrading libgl1-mesa-dri to sid work around either of the
problems?

Though I'm not sure why restoring the older extension modules would make
a difference, the xorg-server changelog doesn't seem to mention any
GLX/DRI2 related changes.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer