https://bugs.freedesktop.org/show_bug.cgi?id=106466

Bug ID: 106466 Summary: GPU recovery fails on Vega 64 Product: DRI Version: unspecified Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: bas@basnieuwenhuizen.nl

Created attachment 139474 --> https://bugs.freedesktop.org/attachment.cgi?id=139474&action=edit dmesg

Reproduce:

1) boot 2) Start X 3) Stop X 4) cat /sys/kernel/debug/dri/2/amdgpu_gpu_recovery 5) Wait till finished 6) Start X 7) Notice slowness 8) Stop X

The dmesg says that the reset failed, but the screen comes back with some artifacts. drawing in X is very slow event though pp_dpm_sclk seems to be indicating reasonable speeds.

I use amd-staging-drm-next as of today with as last commit

commit 905aa01b240f9216b6dbba3226bf10b2d96eebb7 (origin/amd-staging-drm-next) Author: Colin Ian King colin.king@canonical.com Date: Wed May 2 15:43:16 2018 +0100

drm/amd/display: clean up assignment of amdgpu_crtc

The declaration of pointer amdgpu_crtc has a redundant assignment to amdgpu_crtc. Clean this up by removing it.

Detected by CoverityScan, CID#1460299 ("Evaluation order violation")

Reviewed-by: Harry Wentland harry.wentland@amd.com Signed-off-by: Colin Ian King colin.king@canonical.com Signed-off-by: Alex Deucher alexander.deucher@amd.com

plus a patch of my own adding some more dev_info messages to the reset process.