https://bugs.freedesktop.org/show_bug.cgi?id=105819
--- Comment #10 from Antonio Chirizzi <antonio.chiri...@gmail.com> ---
Just to say that the bug is still present with latest ubuntu kernel
4.20.0-042000-generic.
Graphical system hung/frozen, but able to connect through ssh to shutdown the
system (which went through but was never completely achieved by the way):
Jan 12 10:54:37 antonioRyzen kernel: [79117.092896] IPv6:
ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
Jan 12 10:55:46 antonioRyzen kernel: [79186.259081] [drm:amdgpu_job_timedout
[amdgpu]] *ERROR* ring sdma0 timeout, signaled seq=2040014, emi
tted seq=2040017
Jan 12 10:55:46 antonioRyzen kernel: [79186.259091] [drm] GPU recovery
disabled.
Jan 12 10:58:06 antonioRyzen kernel: [79325.706182] INFO: task
kworker/u32:53:5973 blocked for more than 120 seconds.
Jan 12 10:58:06 antonioRyzen kernel: [79325.706189] Not tainted
4.20.0-042000-generic #201812232030
Jan 12 10:58:06 antonioRyzen kernel: [79325.706191] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jan 12 10:58:06 antonioRyzen kernel: [79325.706194] kworker/u32:53 D 0
5973 2 0x80000000
Jan 12 10:58:06 antonioRyzen kernel: [79325.706217] Workqueue: events_unbound
commit_work [drm_kms_helper]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706219] Call Trace:
Jan 12 10:58:06 antonioRyzen kernel: [79325.706230] __schedule+0x29e/0x840
Jan 12 10:58:06 antonioRyzen kernel: [79325.706234] schedule+0x2c/0x80
Jan 12 10:58:06 antonioRyzen kernel: [79325.706236]
schedule_timeout+0x258/0x360
Jan 12 10:58:06 antonioRyzen kernel: [79325.706333] ?
optc1_get_crtc_scanoutpos+0x69/0xa0 [amdgpu]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706338]
dma_fence_default_wait+0x20a/0x280
Jan 12 10:58:06 antonioRyzen kernel: [79325.706340] ?
dma_fence_release+0xa0/0xa0
Jan 12 10:58:06 antonioRyzen kernel: [79325.706343]
dma_fence_wait_timeout+0xe7/0x110
Jan 12 10:58:06 antonioRyzen kernel: [79325.706346]
reservation_object_wait_timeout_rcu+0x201/0x340
Jan 12 10:58:06 antonioRyzen kernel: [79325.706411] ?
amdgpu_get_vblank_counter_kms+0x111/0x160 [amdgpu]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706505]
amdgpu_dm_do_flip+0x12c/0x3a0 [amdgpu]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706598]
amdgpu_dm_atomic_commit_tail+0x738/0xe20 [amdgpu]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706601] ?
__switch_to_asm+0x40/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706603] ?
__switch_to_asm+0x34/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706606] ?
wait_for_completion_timeout+0x38/0x140
Jan 12 10:58:06 antonioRyzen kernel: [79325.706608] ?
__switch_to_asm+0x40/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706610] ?
__switch_to_asm+0x34/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706611] ?
__switch_to_asm+0x40/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706623] commit_tail+0x42/0x70
[drm_kms_helper]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706633] commit_work+0x12/0x20
[drm_kms_helper]
Jan 12 10:58:06 antonioRyzen kernel: [79325.706637]
process_one_work+0x20f/0x410
Jan 12 10:58:06 antonioRyzen kernel: [79325.706640] worker_thread+0x34/0x400
Jan 12 10:58:06 antonioRyzen kernel: [79325.706643] kthread+0x120/0x140
Jan 12 10:58:06 antonioRyzen kernel: [79325.706645] ?
pwq_unbound_release_workfn+0xd0/0xd0
Jan 12 10:58:06 antonioRyzen kernel: [79325.706648] ?
__kthread_parkme+0x70/0x70
Jan 12 10:58:06 antonioRyzen kernel: [79325.706650] ret_from_fork+0x22/0x40
Here comes the reboot:
Jan 12 11:00:30 antonioRyzen kernel: [ 0.000000] Linux version
4.20.0-042000-generic (kernel@tangerine) (gcc version 8.2.0 (Ubuntu
8.2.0-12ubuntu1)) #201812232030 SMP Mon Dec 24 01:32:58 UTC 2018
Jan 12 11:00:30 antonioRyzen kernel: [ 0.000000] Command line:
BOOT_IMAGE=/boot/vmlinuz-4.20.0-042000-generic
root=UUID=38be40bd-cd34-4ab8-93d3-ff3a317f25eb ro quiet splash
processor.max_cstate=1 vt.handoff=1
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