** Description changed: i915_hotplug_work_func cause system crash NoteBook:X200 - Ubuntu 13.04 + lsb_release -a + No LSB modules are available. + Distributor ID: Ubuntu + Description: Ubuntu 13.04 + Release: 13.04 + Codename: raring + uname -a + Linux julien-X200 3.8.0-30-generic #44-Ubuntu SMP Thu Aug 22 20:54:42 UTC 2013 i686 i686 i686 GNU/Linux Mostly the notebook crashes when it restore to work from "suspend" status. Occacionally it also stop work when I use firefox for some time. When the problem happens, I can not use keyboard, mouse and I can not switch to terminal mode through ctl+alt+F1~F6. - I can ssh to the notebook from other pc. + I can ssh to the notebook from other pc, but I can not kill Xorg or reboot the notebook. The proc xorg in "uninterruptable sleep" staus. It seems i915_hotplug_work_func has dead lock. Information from dmesg: [ 2520.564119] INFO: task kworker/u:3:225 blocked for more than 120 seconds. [ 2520.564129] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2520.564135] kworker/u:3 D 00000000 0 225 2 0x00000000 [ 2520.564146] f6f59e90 00000046 f68659b0 00000000 f6f59e48 c1010c58 c19c9100 dcb5da4d [ 2520.564165] 0000021d c19c9100 f7bc8100 f68659b0 00000002 a205ca2a 00000000 efbecfc0 [ 2520.564181] f6f59ed0 c1612d00 00000296 00000000 ed87c426 ef4cc000 c19c9100 00000001 [ 2520.564198] Call Trace: [ 2520.564217] [<c1010c58>] ? __switch_to+0x2a8/0x330 [ 2520.564230] [<c1612d00>] ? __schedule+0x360/0x780 [ 2520.564242] [<c103ce48>] ? default_spin_lock_flags+0x8/0x10 [ 2520.564252] [<c161427d>] ? _raw_spin_lock_irqsave+0x2d/0x40 [ 2520.564269] [<c16133c3>] schedule+0x23/0x60 [ 2520.564278] [<c161360d>] schedule_preempt_disabled+0xd/0x10 [ 2520.564287] [<c1612366>] __mutex_lock_slowpath+0xc6/0x120 [ 2520.564295] [<c1611ef4>] mutex_lock+0x24/0x40 [ 2520.564344] [<f8b03948>] i915_hotplug_work_func+0x28/0x90 [i915] [ 2520.564356] [<c1064b5b>] ? cwq_dec_nr_in_flight+0x5b/0x90 [ 2520.564366] [<c1065785>] process_one_work+0x135/0x3e0 [ 2520.564376] [<c161b973>] ? common_interrupt+0x33/0x38 [ 2520.564386] [<c1066c99>] worker_thread+0x119/0x3c0 [ 2520.564394] [<c1066b80>] ? manage_workers+0x240/0x240 [ 2520.564403] [<c106b6d4>] kthread+0x94/0xa0 [ 2520.564414] [<c1070000>] ? __hrtimer_start_range_ns+0x1f0/0x460 [ 2520.564424] [<c161b3b7>] ret_from_kernel_thread+0x1b/0x28 [ 2520.564432] [<c106b640>] ? kthread_create_on_node+0xc0/0xc0 [ 2520.564450] INFO: task Xorg:1283 blocked for more than 120 seconds. [ 2520.564455] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2520.564459] Xorg D 00000000 0 1283 1275 0x00400004 [ 2520.564468] ef4cdc90 00203086 f34035c0 00000000 000007ff f6f58000 c19c9100 dcb4371d [ 2520.564485] 0000021d c19c9100 f7bc8100 ed87c010 00000000 00000000 00000000 00000000 [ 2520.564509] 00000000 00000000 00000000 00000000 f344f700 ef4cdcf0 ef4cdcfc c10867f9 [ 2520.564525] Call Trace: [ 2520.564537] [<c10867f9>] ? load_balance+0x99/0x670 [ 2520.564546] [<c16133c3>] schedule+0x23/0x60 [ 2520.564555] [<c1611b8d>] schedule_timeout+0x19d/0x240 [ 2520.564565] [<c1613241>] wait_for_common+0xa1/0x120 [ 2520.564575] [<c107c760>] ? try_to_wake_up+0x230/0x230 [ 2520.564584] [<c1613397>] wait_for_completion+0x17/0x20 [ 2520.564594] [<c1064ef7>] flush_workqueue+0xe7/0x330 [ 2520.564604] [<c1030000>] ? perf_ibs_start+0x10/0x120 [ 2520.564613] [<c1030101>] ? perf_ibs_start+0x111/0x120 [ 2520.564658] [<f8b299c7>] intel_crtc_page_flip+0x127/0x360 [i915] [ 2520.564671] [<c114d953>] ? kmem_cache_alloc_trace+0x103/0x110 [ 2520.564715] [<f890c998>] drm_mode_page_flip_ioctl+0x238/0x310 [drm] [ 2520.564732] [<c1611ee8>] ? mutex_lock+0x18/0x40 [ 2520.564766] [<f890c760>] ? drm_mode_gamma_get_ioctl+0xe0/0xe0 [drm] [ 2520.564794] [<f88fceda>] drm_ioctl+0x42a/0x490 [drm] [ 2520.564830] [<f890c760>] ? drm_mode_gamma_get_ioctl+0xe0/0xe0 [drm] [ 2520.564861] [<f88fcab0>] ? drm_copy_field+0x80/0x80 [drm] [ 2520.564871] [<c116fb90>] do_vfs_ioctl+0x80/0x580 [ 2520.564900] [<f88fd8f6>] ? drm_read+0xb6/0x160 [drm] [ 2520.564917] [<c1050f33>] ? do_setitimer+0x123/0x210 [ 2520.564927] [<c1160505>] ? vfs_read+0xe5/0x160 [ 2520.564955] [<f88fd840>] ? drm_fasync+0x90/0x90 [drm] [ 2520.564964] [<c11700fb>] sys_ioctl+0x6b/0x80 [ 2520.564974] [<c161b44d>] sysenter_do_call+0x12/0x28 stack Information from proc kworker/u:3:225 [<f8b03948>] i915_hotplug_work_func+0x28/0x90 [i915] [<c1065785>] process_one_work+0x135/0x3e0 [<c1066c99>] worker_thread+0x119/0x3c0 [<c106b6d4>] kthread+0x94/0xa0 [<c161b3b7>] ret_from_kernel_thread+0x1b/0x28 [<ffffffff>] 0xffffffff From the attached pictures, I915 has about 1300 intertups per seconds, and i915_hotplug_work_func take about 734 ms/s.
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