linux-kernel - Re: [2.6.25-rc6] possible regression: X server dying

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Date:	Tue, 01 Apr 2008 10:02:55 +0100
From:	Tilman Schmidt <tilman@...p.cc>
To:	Dave Airlie <airlied@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [2.6.25-rc6] possible regression: X server dying

On Mon, 31 Mar 2008 14:53:29 +1000, Dave Airlie wrote:
> On Tue, Mar 25, 2008 at 10:53 AM, Dave Airlie <airlied@...il.com> wrote:
>>
>> On Tue, Mar 25, 2008 at 9:45 AM, Tilman Schmidt <tilman@...p.cc> wrote:
[...]
>>  >  | Backtrace:
>>  >  | 0: /usr/bin/X(xf86SigHandler+0x81) [0x80e6d81]
>>  >  | 1: [0xb7fc9400]
>>  >  | 2: /usr/lib/xorg/modules//extensions/libGLcore.so(_swrast_Triangle+0x2d) [0xb51ea5dd]
>>  >  | 3: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb51f1075]
>>  >  | 4: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb5206f2e]
>>  >  | 5: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb52080b8]
>>  >  | 6: /usr/lib/xorg/modules//extensions/libGLcore.so(_tnl_run_pipeline+0x153) [0xb520cb83]
>>  >  | 7: /usr/lib/xorg/modules//extensions/libGLcore.so(_tnl_draw_prims+0x3f0) [0xb51f8340]
>>  >  | 8: /usr/lib/xorg/modules//extensions/libGLcore.so(vbo_exec_vtx_flush+0x1fb) [0xb52471eb]
>>  >  | 9: /usr/lib/xorg/modules//extensions/libGLcore.so(vbo_exec_FlushVertices+0x78) [0xb52488e8]
>>  >  | 10: /usr/lib/xorg/modules//extensions/libGLcore.so(_mesa_Flush+0x83) [0xb5112663]
>>  >  | 11: /usr/lib/xorg/modules//extensions/libglx.so [0xb7c6a107]
>>  >  | 12: /usr/lib/xorg/modules//extensions/libglx.so [0xb7c4aa6d]
>>  >  | 13: /usr/bin/X [0x815809e]
>>  >  | 14: /usr/bin/X(Dispatch+0x1af) [0x808f68f]
>>  >  | 15: /usr/bin/X(main+0x47e) [0x807717e]
>>  >  | 16: /lib/libc.so.6(__libc_start_main+0xe0) [0xb7d5dfe0]
>>  >  | 17: /usr/bin/X(FontFileCompleteXLFD+0x1e5) [0x8076501]
>>  >  |
>>  >  | Fatal server error:
>>  >  | Caught signal 11.  Server aborting
> 
> any look finding what might have caused this?

Not really. It's obviously triggered by the screensaver. The machine
runs SuSE's default: gnome-screensaver with mode = random and a list
of 189 candidate screensavers, so I can't tell which one(s) of those
actually triggers the problem.

But perhaps that doesn't matter anyway. I recently collected another
X backtrace with kernel 2.6.25-rc7 which looks quite different in
the libglx section:

0: /usr/bin/X(xf86SigHandler+0x81) [0x80e6d81]
1: [0xb7ef7400]
2: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7d8e8]
3: /usr/lib/xorg/modules//extensions/libglx.so(DoRender+0xdd) [0xb7b7645d]
4: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7657c]
5: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7aa6d]
6: /usr/bin/X [0x815809e]
7: /usr/bin/X(Dispatch+0x1af) [0x808f68f]
8: /usr/bin/X(main+0x47e) [0x807717e]
9: /lib/libc.so.6(__libc_start_main+0xe0) [0xb7c8bfe0]
10: /usr/bin/X(FontFileCompleteXLFD+0x1e5) [0x8076501]

But I know next to nothing about GL, so I'm out of my depth there.
I'd welcome any suggestions on how to provoke the crash more
regularly so that I could attempt to bisect.

Thanks,
Tilman

-- 
Tilman Schmidt                    E-Mail: tilman@...p.cc
Bonn, Germany
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