https://bugs.freedesktop.org/show_bug.cgi?id=110865
--- Comment #19 from Martin mwolf@adiumentum.com --- with 70W i mean total system power-consumption of course. This is roughly the same / a little more as with Windows. So we are on a good path I think.
If i do "echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level" the flickering stops. So the flickering is caused by the automatic powermanagement / reclocking.