[req kernel 3.10] Xorg crashed with intel_dri backtrace whil attending a google hangout

[Søren Holm]

Basically I just enter a hangout and then after a while - 30 seconds or so - the system crashes with this backtrace

[ 432.229] (EE)
[ 432.230] (EE) Backtrace:
[ 432.250] (EE) 0: /usr/bin/X (xorg_backtrace+0x49) [0xb7751f99]
[ 432.258] (EE) 1: /usr/bin/X (0xb75b1000+0x1a4d04) [0xb7755d04]
[ 432.258] (EE) 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb758e40c]
[ 432.258] (EE) 3: /usr/lib/i386-linux-gnu/libpixman-1.so.0 (0xb73e1000+0x65820) [0xb7446820]
[ 432.258] (EE) 4: /usr/lib/i386-linux-gnu/libpixman-1.so.0 (0xb73e1000+0x4c1bc) [0xb742d1bc]
[ 432.259] (EE) 5: /usr/lib/i386-linux-gnu/libpixman-1.so.0 (pixman_fill+0x5d) [0xb73e75bd]
[ 432.260] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb6e57000+0x666a6) [0xb6ebd6a6]
[ 432.260] (EE) 7: /usr/bin/X (CompositeRects+0x6a) [0xb76cb4ea]
[ 432.260] (EE) 8: /usr/bin/X (0xb75b1000+0x11ebb9) [0xb76cfbb9]
[ 432.260] (EE) 9: /usr/bin/X (0xb75b1000+0x11aa1e) [0xb76cba1e]
[ 432.260] (EE) 10: /usr/bin/X (0xb75b1000+0x3d255) [0xb75ee255]
[ 432.260] (EE) 11: /usr/bin/X (0xb75b1000+0x2b4aa) [0xb75dc4aa]
[ 432.261] (EE) 12: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0xb719c935]
[ 432.261] (EE) 13: /usr/bin/X (0xb75b1000+0x2b889) [0xb75dc889]
[ 432.261] (EE)
[ 432.262] (EE) Bus error at address 0xb133a754

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.9.0-2.7-generic 3.9.3
Uname: Linux 3.9.0-2-generic i686
ApportVersion: 2.10.2-0ubuntu1
Architecture: i386
Date: Tue May 28 09:22:29 2013
InstallationDate: Installed on 2013-05-21 (6 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130521)
MarkForUpload: True
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Wilson (ickle)]

This is a secondary bug, fixed by
kernel commit 2231b9c15c212ae2d9fb1a214d62678c89345fcd
Author: Daniel Vetter <email address hidden>
Date: Fri May 24 21:29:32 2013 +0200

    drm/i915: Fix spurious -EIO/SIGBUS on wedged gpus

following a GPU hang caused by mesa.

[Søren Holm (sgh)]

Thanks ....

[Søren Holm (sgh)]

Hmmm ... where is that commit .... I can't find it in linus' kernel tree.

[Chris Wilson (ickle)]

Patience, it is almost there...

In the meantime it is in drm-intel-fixes, drm-fixes, and of course ppa:mainline drm-intel-nightly.

Don't forget that even after the random explosion of X is fixed, someone is hanging your GPU. You should apt-get install xdiagnose and fill a bug with the i915_error_state.