Comment # 5
on bug 105819
from Kertesz Laszlo
I have this issue too. Debian testing, kernel compiled from mainline git It begun with the 4.18 kernels (mainline), now i am on 4.18 rc2+ and still happens. I did not see this with the 4.17 kernels. For me it happened a few times, most times i was clicking around in Firefox and once when i let the computer idle (Firefox was still in the foreground though). I logged in via ssh and captured these from dmesg: One instance (i think i reset the system with the magic key combination so it didn't get to the hung timeout: [ 3459.767019] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma0 timeout, last signaled seq=92850, last emitted seq=92853 [ 3459.767028] amdgpu 0000:06:00.0: GPU reset begin! Another one: [275981.536711] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma0 timeout, last signaled seq=5720217, last emitted seq=5720220 [275981.536720] amdgpu 0000:06:00.0: GPU reset begin! [276099.291632] INFO: task kworker/u32:3:15729 blocked for more than 120 seconds. [276099.291639] Tainted: G W E 4.18.0-rc1 #1 [276099.291641] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [276099.291643] kworker/u32:3 D 0 15729 2 0x80000000 [276099.291661] Workqueue: events_unbound commit_work [drm_kms_helper] [276099.291664] Call Trace: [276099.291674] ? __schedule+0x2b7/0x890 [276099.291680] ? __update_load_avg_se.isra.38+0x1cf/0x1e0 [276099.291684] schedule+0x28/0x80 [276099.291688] schedule_timeout+0x1ee/0x380 [276099.291754] ? generic_reg_get+0x20/0x30 [amdgpu] [276099.291815] ? optc1_get_crtc_scanoutpos+0x68/0xa0 [amdgpu] [276099.291820] dma_fence_default_wait+0x1fd/0x280 [276099.291823] ? dma_fence_release+0x90/0x90 [276099.291826] dma_fence_wait_timeout+0x39/0xf0 [276099.291830] reservation_object_wait_timeout_rcu+0x17b/0x370 [276099.291892] amdgpu_dm_do_flip+0x112/0x350 [amdgpu] [276099.291898] ? __wake_up_common+0x76/0x170 [276099.291955] amdgpu_dm_atomic_commit_tail+0xb91/0xd90 [amdgpu] [276099.291961] ? __switch_to+0x16f/0x440 [276099.291970] commit_tail+0x3d/0x70 [drm_kms_helper] [276099.291974] process_one_work+0x195/0x370 [276099.291978] worker_thread+0x30/0x390 [276099.291981] ? process_one_work+0x370/0x370 [276099.291984] kthread+0x113/0x130 [276099.291987] ? kthread_create_worker_on_cpu+0x70/0x70 [276099.291990] ret_from_fork+0x22/0x40
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