(In reply to Shmerl from comment #31)
> I can confirm, that at 2560x1440 / 144 Hz, after suspend / resume, setting
> "high" in /sys/class/drm/card0/device/power_dpm_force_performance_level
> stops flickering that starts after resume, and then setting "low" there
> still keeps it flickering free, while dropping MCLK and power consumption to
> what you expect from a normal idle level! 
> 
> You can check that with:
> 
>     sudo cat /sys/kernel/debug/dri/0/amdgpu_pm_info
> 
> So it means the card can handle it after all, but somehow doesn't
> dynamically adjust to that state.
> 
> Can anyone from AMD please comment on this situation?

Hello 'Shmerl',

can you (and the other) please recheck with 'auto', too?
I think we have the 'same' problem with Polaris, too.
If one set low/high it is set @fixed frequency and NOT @ the 'flickering'
'auto' mode.

I can't test the 'suspend / resume' cycle 'cause my server/workstation do NOT
work reliable on it.
But power consumption is definitely to high on Polaris, too.

@Alex: What do you think about this?