[Bug 107082] With 4.18 rc kernel stop working video output on AMD GPU Vega 56

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107082

--- Comment #4 from mikhail.v.gavrilov at gmail.com ---
(In reply to Harry Wentland from comment #3)
> Created attachment 140594 [details] [review]
> [PATCH] drm/amd/display: Convert 10kHz clks from PPLib into kHz for Vega
> 
> Don't think the other patch would apply to 4.18 but this one should. There's
> been a bunch of work on the powerplay/DC interface, so this looks different
> for 4.18 and amd-stg.

I can confirm that this patch fix the issue.

But I did not like one thing:
I decided to check how work VEGA GPU through HDMI and connected the second
monitor via HDMI.

The first that I did not like was that on the first monitor which was connected
via DisplayPort, the scaling setting was reset from 200% to 100%.

The second that I did not like was that when I tried to set the scaling at 200%
through gnome-settings, my computer was hung. I even could not connect through
ssh to look at the kernel log.

I tried to repeat this case but unsuccessfully, but unpleasant residue still
remained.

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