[Bug 87796] radeonsi 120Hz graphic glitches

https://bugs.freedesktop.org/show_bug.cgi?id=87796

--- Comment #11 from Clésio Luiz magolobel@yahoo.com.br --- (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.