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Bug#478893: libgl1-mesa-dri: stalls or crashes on GLX

Package: libgl1-mesa-dri
Version: 7.0.3-1
Severity: normal

I was trying to run freesurfer (1GB monster download which is not in
Debian unfortunately) on some dataset on my laptop. 
When GL window appears system freezes (doesn't response to Ctrl-Alt-BS),
and in xorg.log.old (after SysRq forced reboot) I find:

| (II) intel(0): Modeline "1280x1024"x59.9  109.00  1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync (63.7 kHz)
| (II) intel(0): EDID vendor "LEN", prod id 16389
| Backtrace:
| 0: /usr/bin/X(xf86SigHandler+0x6a) [0x4755da]
| 1: /lib/libc.so.6 [0x2b1aee99c240]
| 2: /usr/lib/dri/i965_dri.so [0x2b1b019a1ceb]
| 3: /usr/lib/dri/i965_dri.so(brw_upload_vertices+0x20a) [0x2b1b019a222a]
| 4: /usr/lib/dri/i965_dri.so [0x2b1b019a1769]
| 5: /usr/lib/dri/i965_dri.so(brw_draw_prims+0xb0) [0x2b1b019a1a00]
| 6: /usr/lib/dri/i965_dri.so [0x2b1b01a378eb]
| 7: /usr/lib/xorg/modules/extensions//libglx.so [0x2b1aefa83295]
| 8: /usr/lib/xorg/modules/extensions//libglx.so(DoRenderLarge+0x356) [0x2b1aefa64da6]
| 9: /usr/lib/xorg/modules/extensions//libglx.so [0x2b1aefa6872c]
| 10: /usr/bin/X(Dispatch+0x2e0) [0x44e300]
| 11: /usr/bin/X(main+0x47d) [0x436add]
| 12: /lib/libc.so.6(__libc_start_main+0xf4) [0x2b1aee9891c4]
| 13: /usr/bin/X(FontFileCompleteXLFD+0x281) [0x435e19]
| Fatal server error:
| Caught signal 11.  Server aborting
| (II) AIGLX: Suspending AIGLX clients for VT switch
Full log is at: http://www.onerussian.com/Linux/bugs/xorg.crash/Xorg.0.log.stalled_at_12:29:40

Looking at #473551, I've decided to enable 
Option "NoTrapSignals"  "True"
and then system doesn't halt but it restarts X. Corresponding xorg.0.log is at

My xorg.conf can be found at
and dmesg

Please let me know what other troubleshooting I should do to come closer to help to pin down the problem?

Thanks in advance

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (990, 'testing'), (600, 'unstable'), (300, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages libgl1-mesa-dri depends on:
ii  libc6                         2.7-10     GNU C Library: Shared libraries
ii  libdrm2                       2.3.0-4    Userspace interface to kernel DRM 
ii  libexpat1                     1.95.8-4   XML parsing C library - runtime li
ii  libgl1-mesa-glx               7.0.3-1    A free implementation of the OpenG

libgl1-mesa-dri recommends no packages.

-- no debconf information

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