https://bugs.freedesktop.org/show_bug.cgi?id=109955

--- Comment #129 from Wilko Bartels <me@jasondaigo.de> ---
(In reply to haro41 from comment #122)
> In my experience, this issue is related to mclk switching and it affects the
> lowest mclk level only.
> 
> So you guy's can save a lot of power, if you, insteed of switching to
> highest gfxlevel or to disable vsync, just disable the lowest mclk level by:
> 
> echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level
> echo "1 2 3" > /sys/class/drm/card0/device/pp_dpm_mclk
> 
> If you are building your kernel locally, look in this thread for a driver
> code modification that works, without disabling the lowest mclk level (saves
> a few watt on idle).

do you have any suggestion to automate this? so far i can strictly run these
commands after su. not even sudo works with scripts running these commands. or
systemd files.

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