Experiencing this problem on Ubuntu 12.04 (linux-3.2.0-24-generic) without nolapic boot option though. When the error happens, a prior mouse hang of several seconds is a sure sign, the tft gets dark and restores, gets dark and restores, then graphics acceleration appears disabled, font displayed with faults and I have to log out and log in. The problem seems to be gone in the new kde session with desktop effects on ... until I boot anew.
Experiencing this problem on Ubuntu 12.04 (linux- 3.2.0-24- generic) without nolapic boot option though. When the error happens, a prior mouse hang of several seconds is a sure sign, the tft gets dark and restores, gets dark and restores, then graphics acceleration appears disabled, font displayed with faults and I have to log out and log in. The problem seems to be gone in the new kde session with desktop effects on ... until I boot anew.
My dmesg succeeding the error is:
[ 63.965111] [<ffffffff81067 12f>] warn_slowpath_ common+ 0x7f/0xc0 18a>] warn_slowpath_ null+0x1a/ 0x20 9e4>] __gen6_ gt_wait_ for_fifo+ 0x94/0xa0 [i915] 065>] i915_write32+ 0xe5/0xf0 [i915] 752>] gen6_ring_ put_irq+ 0xa2/0xc0 [i915] 7c8>] gen6_render_ ring_put_ irq+0x18/ 0x20 [i915] ba7>] i915_wait_ request+ 0x1b7/0x560 [i915] ec0>] ? add_wait_ queue+0x60/ 0x60 f82>] i915_gem_ object_ wait_rendering+ 0x32/0x40 [i d3d>] i915_gem_ execbuffer_ sync_rings+ 0xdd/0x160 [ f2e>] i915_gem_ execbuffer_ move_to_ gpu+0x16e/ 0x200 65b>] i915_gem_ do_execbuffer. isra.8+ 0x69b/0x940 [ 349>] ? intel_mark_ busy+0xd9/ 0x110 [i915] dc3>] i915_gem_ execbuffer2+ 0xa3/0x270 [i915] 5d4>] drm_ioctl+ 0x444/0x510 [drm] d20>] ? i915_gem_ execbuffer+ 0x420/0x420 [i915] bd4>] ? restore_ user_xstate+ 0x54/0xa0 cfa>] do_vfs_ ioctl+0x8a/ 0x340 041>] sys_ioctl+0x91/0xa0 a82>] system_ call_fastpath+ 0x16/0x1b hangcheck_ elapsed] *ERROR* Hangcheck timer elapsed... GPU hung dri/0/i915_ error_state wait_request] *ERROR* i915_wait_request returns -11 (awaiting 11846 at 11845, next 11847) ring_common] *ERROR* render ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000 ring_common] *ERROR* gen6 bsd ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000 ring_common] *ERROR* blt ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000 hangcheck_ elapsed] *ERROR* Hangcheck timer elapsed... GPU hung wait_request] *ERROR* i915_wait_request returns -11 (awaiting 11847 at 11844, next 11848)
[ 63.965112] [<ffffffff81067
[ 63.965116] [<ffffffffa0077
[ 63.965121] [<ffffffffa0078
[ 63.965126] [<ffffffffa00b4
[ 63.965131] [<ffffffffa00b4
[ 63.965136] [<ffffffffa0089
[ 63.965138] [<ffffffff8108a
[ 63.965143] [<ffffffffa0089
915]
[ 63.965148] [<ffffffffa008e
i915]
[ 63.965153] [<ffffffffa008e
[i915]
[ 63.965157] [<ffffffffa008f
i915]
[ 63.965163] [<ffffffffa009f
[ 63.965168] [<ffffffffa008f
[ 63.965172] [<ffffffffa0016
[ 63.965177] [<ffffffffa008f
[ 63.965179] [<ffffffff8101d
[ 63.965181] [<ffffffff81189
[ 63.965183] [<ffffffff8118a
[ 63.965185] [<ffffffff81664
[ 63.965186] ---[ end trace 20690ee302d12d8d ]---
[ 68.296329] [drm:i915_
[ 68.297855] [drm] capturing error event; look for more information in /debug/
[ 68.311854] [drm:i915_
[ 68.315568] [drm:init_
[ 68.319138] [drm:init_
[ 68.322179] [drm:init_
[ 70.159916] [drm:i915_
[ 70.161991] [drm:i915_
[ 70.162096] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged!
[ 70.162100] [drm:i915_reset] *ERROR* Failed to reset chip.