Comment # 11
on bug 87796
from Clésio Luiz
(In reply to Alex Deucher from comment #10) > It looks like maybe the dpm memory reclocking occasionally misses the > vblank. Do you still get the glitches if you connect a secondary display or > disable dynamic clocking? To disable able dynamic clocking (as root): > echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level > to re-enable it (as root): > echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level The High value makes the glitches go away. As soon as I set the Auto value, the glitches reappear. I don't have access to a second display to test right now, only tomorrow.
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