Comment # 6 on bug 85107 from Marcel Witte

As written in the first comment the clocks never change. Running vblank_mode=0
glxgears does not change the clocks, also

echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level

makes no difference to the values.

The initial value of
/sys/class/drm/card0/device/power_dpm_force_performance_level is "auto".