Comment # 122
on bug 109955
from haro41@gmx.de
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).
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