System display will be gone suddenly after amdgpu is loaded and gdm is started

Submitted by jia..@..sm.com

Assigned to Default DRI bug account

Description

Created attachment 140723
System's journal log with 4.18-rc5

I have a hardware whose MB is Acer Nitro N50-100 (AMD Ryzen: ZD2600BBM68AF_38/34_Y) and graphic card is AMD Radeon RX 580.

I have tried Linux kernel 4.18-rc5 with parameters "amdgpu.dc_log=1 drm.debug=7" on this hardware. System display will be gone suddenly and not come back after amdgpu is loaded and gdm is started. However, I still can ssh into the system. The error was shown:

[ 23.007070] [drm:amdgpu_job_timedout [amdgpu]] ERROR ring sdma0 timeout, last signaled seq=173, last emitted seq=175
[ 23.007087] [drm:amdgpu_job_timedout [amdgpu]] ERROR ring gfx timeout, last signaled seq=26, last emitted seq=27
[ 23.007088] [drm] GPU recovery disabled.
[ 23.007090] [drm] GPU recovery disabled.

The attachment is the full journal log.

If I blacklist amdgpu module, it can boot and go into the desktop environment correctly.

Attachment 140723, "System's journal log with 4.18-rc5":
journal.txt