Comme=
nt # 66
on bug 10264=
6
from Lefteris Chatzimparmpas
While the workaround with power_dpm_force_performance_level/pp=
_dpm_mclk works
for me, I found another way to stop the flickering, which I mention here in
case it helps debugging.
My monitor has a native resolution of 1920x1200 at 75Hz or 60Hz through DP,=
and
60Hz through HDMI. It supports Freesync through DP, but I have that disabl=
ed.=20
I'm using the 4.19 kernel.
When through a DP cable, if I switch the resolution to 1920x1080 at 60Hz, a=
nd
then revert back to the native 1920x1200 at 75Hz, the flickering stops for
good. If I turn off and on the monitor, everything is still good, but if I
reboot or do a sleep and wakeup of the computer, then the flickering return=
s,
that is until I switch the resolution again.
Through HDMI, I don't get the flickering on the native resolution, possibly
because I get this max resolution at 60Hz. But note that through DP, chang=
ing
to 60Hz alone doesn't seem to help.
Also, through HDMI, I can make the flickering start, if I switch to 1440x90=
0 at
75Hz, and then it only stops if I switch to 1920x1080 at 60Hz and then back=
to
native.
Finally, after I got the flickering stop with the resolution switch, I tried
watching the pp_dpm_mclk, and I could see it changing values very fast, sim=
ilar
to when I had the flickering problem.