Created attachment 140723 [details] 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.
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