I guess this patch fixes the issue:
commit b05f65d7720b172b6fde3abfa49ed66837071d45
Author: Alex Deucher <alexander.deuc...@amd.com>
Date: Thu Aug 15 08:27:09 2019 -0500
drm/amdgpu/gfx9: update pg_flags after determining if gfx off is
possible
We need to set certain power gating flags after we determine
if the firmware version is sufficient to support gfxoff.
Previously we set the pg flags in early init, but we later
we might have disabled gfxoff if the firmware versions didn't
support it. Move adding the additional pg flags after we
determine whether or not to support gfxoff.
Fixes: 005440066f92 ("drm/amdgpu: enable gfxoff again on raven series (v2)")
Tested-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
Tested-by: Tom St Denis <tom.stde...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: Kai-Heng Feng <kai.heng.f...@canonical.com>
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4-rc5/
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https://bugs.launchpad.net/bugs/1848741
Title:
[amdgpu] Ubuntu 19.10 horizontal graphics corruption on AMD Ryzen
2500u (Raven Ridge)
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