Comment # 13
on bug 100979
from Przemek
Using the opportunity that I was working on another bug report with AMD DC kernel driver, and have git cloned agd5f drm-next-4.17-wip branch, I have tried to debug the situation on hibernate process with this experimental kernel also. This time hibernation image is created, and laptop turns off after that. But - during the hibernation process screen goes totally white, process take approximately 15-20 seconds on ssd drive before netbook gets power-off. During resume hibernation image is read (it is possible to see percentage) and then screen goes white, and machine is in a locked-up state. I can do nothing but press power button to hard-reset the netbook. Moreover I foud only once an error message in kernel log: "Mar 28 01:36:54 eclipse kernel: [ 86.665473] [drm:drm_atomic_helper_wait_for_flip_done] *ERROR* [CRTC:39:crtc-0] flip_done timed out Mar 28 01:36:54 eclipse kernel: [ 86.828685] [drm:gfx_v7_0_ring_test_ring] *ERROR* amdgpu: ring 0 test failed (scratch(0xC040)=0xCAFEDEAD) Mar 28 01:36:54 eclipse kernel: [ 86.828698] [drm:amdgpu_device_ip_resume_phase2] *ERROR* resume of IP block <gfx_v7_0> failed -22 Mar 28 01:36:54 eclipse kernel: [ 86.828703] [drm:amdgpu_device_resume] *ERROR* amdgpu_device_ip_resume failed (-22). Mar 28 01:36:54 eclipse kernel: [ 86.828718] dpm_run_callback(): pci_pm_restore+0x0/0xa0 returns -22 Mar 28 01:36:54 eclipse kernel: [ 86.828742] PM: Device 0000:00:01.0 failed to restore async: error -22" of course I am unable to reproduce it. I am not sure how much it is related but this could be usefull, tough. Kernel was booted up with amdgpu.dc=1. Any help is appreciated. Thanks, Przemek.
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