Created attachment 682666 [details]
/sys/kernel//debug/dri/0/i915_error_state

Description of problem:

X freeze system random every 15/30 minutes, with firefox open.


Version-Release number of selected component (if applicable):
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$ uname -r
3.7.2-201.fc18.i686.PAE
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$ lspci -k|grep -iA 6 vga
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
	Subsystem: Sony Corporation Device 9071
	Kernel driver in use: i915
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xorg-x11-drv-intel-2.20.17-1.fc18.i686
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$ dmesg
[3397.091083] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[ 3397.091091] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[ 3398.751085] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[ 3398.751309] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged!
[ 3398.751315] [drm:i915_reset] *ERROR* Failed to reset chip.
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Additional info:

Same problem in Fedora 17:
https://bugzilla.redhat.com/show_bug.cgi?id=869354
https://bugzilla.redhat.com/show_bug.cgi?id=868690