[Bug 57136] [GM45 regression] GPU hang during disk io

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57136

--- Comment #18 from Tom London <selinux at gmail.com> ---
Looks like I can reproduce this pretty easily: I have a directory with my KVM
guest images plus some CD ISO images.

Running 'cat all those files >/dev/null' hangs/crashes my system (I had only
rhythmbox, firefox + a couple of gnome-terminal windows open).

This hang occurred with a newly built/booted Fedora
kernel-3.7.1-1.local.fc19.x86_64 (above patch included).

Here is the dmesg spew. Let me know if the i915_error_state would be helpful.

[ 7438.644043] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 7438.644056] [drm] capturing error event; look for more information in
/debug/dri/0/i915_error_state
[ 7444.672037] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 7444.723034] [drm:init_ring_common] *ERROR* render ring initialization failed
ctl 0001f001 head 00003000 tail 00000000 start 00003000
[ 7446.228045] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 7446.228178] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged!
[ 7446.228181] [drm:i915_reset] *ERROR* Failed to reset chip.
[ 7473.694112] gnome-shell[3157]: segfault at 230 ip 00007fc2f58c589f sp
00007fffd9fe8a60 error 4 in i965_dri.so[7fc2f5873000+b3000]

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