https://bugzilla.kernel.org/show_bug.cgi?id=214071 Alex Deucher (alexdeucher@xxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |alexdeucher@xxxxxxxxx --- Comment #3 from Alex Deucher (alexdeucher@xxxxxxxxx) --- The driver can only change memory clocks during display blanking periods to avoid display glitches. If the blanking period is too short, the driver can't change the memory clock so it keeps it clocked high. You could try adjusting the modelines for the problematic modes to extend the blanking periods and see if that helps. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.