Ctrl++ Alt、++及其变体等解决方案均不起作用，我的键盘似乎被冻结了。有人能找出导致系统故障的原因吗？我在这里附上我F1的：AltPrtScreenKsyslog
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078396] INFO: task kworker/5:3:3442 blocked for more than 120 seconds.
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078399] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078399] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078400] kworker/5:3 D 0000000000000000 0 3442 2 0x00000000
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078425] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078427] ffff8803cc9ebb58 0000000000000046 ffff880340ca3b00 ffff8800b6de8ec0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078428] 0000000100367e4c ffff8803cc9ec000 0000000000000000 7fffffffffffffff
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078430] ffff88040a340000 ffff88040a341f28 ffff8803cc9ebb78 ffffffff817b8b57
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078431] Call Trace:
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078435] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078437] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078439] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078441] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078443] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078451] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078453] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078455] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078457] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078458] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078468] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078470] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078472] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078474] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078475] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078476] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078478] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078479] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078482] INFO: task kworker/5:1:5369 blocked for more than 120 seconds.
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078483] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078484] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078484] kworker/5:1 D 0000000000000000 0 5369 2 0x00000000
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078494] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078495] ffff8803cafa3b58 0000000000000046 ffff88040a271d80 ffff8803e4e0e740
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078496] 000000010036629c ffff8803cafa4000 0000000000000000 7fffffffffffffff
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078497] ffff88040a340000 ffff88040a341f28 ffff8803cafa3b78 ffffffff817b8b57
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078499] Call Trace:
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078500] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078501] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078503] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078505] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078506] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078507] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078509] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078516] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078517] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078518] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078520] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078521] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078530] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078532] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078533] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078535] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078536] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078538] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078539] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:05:46 mi-OptiPlex-7040 kernel: [14737.078540] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890922] INFO: task kworker/5:3:3442 blocked for more than 120 seconds.
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890926] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890927] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890929] kworker/5:3 D 0000000000000000 0 3442 2 0x00000000
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890954] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890956] ffff8803cc9ebb58 0000000000000046 ffff880340ca3b00 ffff8800b6de8ec0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890958] 0000000100367e4c ffff8803cc9ec000 0000000000000000 7fffffffffffffff
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890960] ffff88040a340000 ffff88040a341f28 ffff8803cc9ebb78 ffffffff817b8b57
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890962] Call Trace:
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890968] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890970] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890974] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890977] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890980] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890992] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890995] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.890997] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891000] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891003] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891018] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891021] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891024] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891026] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891029] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891031] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891033] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891035] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891039] INFO: task kworker/5:1:5369 blocked for more than 120 seconds.
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891040] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891041] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891042] kworker/5:1 D 0000000000000000 0 5369 2 0x00000000
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891058] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891059] ffff8803cafa3b58 0000000000000046 ffff88040a271d80 ffff8803e4e0e740
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891061] 000000010036629c ffff8803cafa4000 0000000000000000 7fffffffffffffff
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891063] ffff88040a340000 ffff88040a341f28 ffff8803cafa3b78 ffffffff817b8b57
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891065] Call Trace:
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891068] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891069] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891072] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891074] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891076] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891079] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891081] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891092] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891094] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891096] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891098] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891101] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891114] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891117] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891119] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891122] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891124] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891126] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891127] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:07:46 mi-OptiPlex-7040 kernel: [14856.891129] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703351] INFO: task kworker/5:3:3442 blocked for more than 120 seconds.
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703354] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703355] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703356] kworker/5:3 D 0000000000000000 0 3442 2 0x00000000
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703373] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703374] ffff8803cc9ebb58 0000000000000046 ffff880340ca3b00 ffff8800b6de8ec0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703376] 0000000100367e4c ffff8803cc9ec000 0000000000000000 7fffffffffffffff
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703377] ffff88040a340000 ffff88040a341f28 ffff8803cc9ebb78 ffffffff817b8b57
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703378] Call Trace:
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703382] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703384] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703386] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703388] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703390] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703398] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703400] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703401] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703403] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703405] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703415] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703417] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703419] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703420] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703422] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703423] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703424] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703426] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703428] INFO: task kworker/5:1:5369 blocked for more than 120 seconds.
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703429] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703430] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703430] kworker/5:1 D 0000000000000000 0 5369 2 0x00000000
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703440] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703441] ffff8803cafa3b58 0000000000000046 ffff88040a271d80 ffff8803e4e0e740
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703442] 000000010036629c ffff8803cafa4000 0000000000000000 7fffffffffffffff
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703444] ffff88040a340000 ffff88040a341f28 ffff8803cafa3b78 ffffffff817b8b57
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703445] Call Trace:
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703447] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703448] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703449] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703451] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703452] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703453] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703455] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703462] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703463] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703464] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703466] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703467] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703476] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703478] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703479] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703481] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703482] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703483] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703485] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:09:46 mi-OptiPlex-7040 kernel: [14976.703486] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:10:29 mi-OptiPlex-7040 kernel: [15020.529410] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:38 mi-OptiPlex-7040 kernel: [15028.756536] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:42 mi-OptiPlex-7040 kernel: [15032.654447] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:43 mi-OptiPlex-7040 kernel: [15033.932448] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:43 mi-OptiPlex-7040 kernel: [15034.140122] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:43 mi-OptiPlex-7040 kernel: [15034.315834] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:43 mi-OptiPlex-7040 kernel: [15034.491560] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:44 mi-OptiPlex-7040 kernel: [15034.683267] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:44 mi-OptiPlex-7040 kernel: [15034.954846] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:50 mi-OptiPlex-7040 kernel: [15040.705846] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:50 mi-OptiPlex-7040 kernel: [15041.440683] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:10:52 mi-OptiPlex-7040 kernel: [15042.622832] sysrq: SysRq : This sysrq operation is disabled.
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515797] INFO: task kworker/5:3:3442 blocked for more than 120 seconds.
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515800] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515800] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515801] kworker/5:3 D 0000000000000000 0 3442 2 0x00000000
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515819] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515821] ffff8803cc9ebb58 0000000000000046 ffff880340ca3b00 ffff8800b6de8ec0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515822] 0000000100367e4c ffff8803cc9ec000 0000000000000000 7fffffffffffffff
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515824] ffff88040a340000 ffff88040a341f28 ffff8803cc9ebb78 ffffffff817b8b57
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515825] Call Trace:
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515829] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515831] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515834] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515836] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515838] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515846] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515848] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515849] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515851] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515853] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515863] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515866] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515867] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515869] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515871] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515872] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515874] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515876] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515879] INFO: task kworker/5:1:5369 blocked for more than 120 seconds.
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515881] Tainted: G W 4.2.0-27-generic #32~14.04.1-Ubuntu
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515882] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515883] kworker/5:1 D 0000000000000000 0 5369 2 0x00000000
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515893] Workqueue: events intel_mmio_flip_work_func [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515894] ffff8803cafa3b58 0000000000000046 ffff88040a271d80 ffff8803e4e0e740
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515895] 000000010036629c ffff8803cafa4000 0000000000000000 7fffffffffffffff
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515897] ffff88040a340000 ffff88040a341f28 ffff8803cafa3b78 ffffffff817b8b57
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515898] Call Trace:
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515900] [<ffffffff817b8b57>] schedule+0x37/0x80
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515901] [<ffffffff817bb511>] schedule_timeout+0x201/0x2a0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515903] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515904] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515906] [<ffffffff8101d7f9>] ? read_tsc+0x9/0x10
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515907] [<ffffffff810e711e>] ? ktime_get+0x3e/0xa0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515909] [<ffffffff817b81c6>] io_schedule_timeout+0xa6/0x120
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515916] [<ffffffffc02c1401>] __i915_wait_request+0x3f1/0x530 [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515917] [<ffffffff810b7970>] ? prepare_to_wait_event+0xf0/0xf0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515918] [<ffffffff810a9066>] ? set_next_entity+0xa6/0x4c0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515919] [<ffffffff817ae9da>] ? queued_spin_lock_slowpath+0xb/0xf
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515921] [<ffffffff8101f352>] ? __switch_to_xtra+0x142/0x180
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515929] [<ffffffffc0302800>] intel_mmio_flip_work_func+0x40/0x3a0 [i915]
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515931] [<ffffffff8108fb0e>] process_one_work+0x14e/0x3d0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515933] [<ffffffff810901ba>] worker_thread+0x11a/0x470
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515934] [<ffffffff810900a0>] ? rescuer_thread+0x310/0x310
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515936] [<ffffffff81095732>] kthread+0xd2/0xf0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515937] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515938] [<ffffffff817bc7df>] ret_from_fork+0x3f/0x70
May 15 14:11:46 mi-OptiPlex-7040 kernel: [15096.515939] [<ffffffff81095660>] ? kthread_create_on_node+0x1c0/0x1c0
机器信息
戴尔 OptiPlex 7040
Ubuntu 14.04
内核版本 4.2.0-27-generic