https://bugs.freedesktop.org/show_bug.cgi?id=69395
--- Comment #3 from Alex Deucher agd5f@yahoo.com --- What does the dpm debugfs output show when you are bitmining? e.g., cat /sys/kernel/debug/dri/64/radeon_pm_info
Also does manually forcing the performance level to high help? E.g., echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level
Note, you may need to adjust the paths above depending on your system.