https://bugzilla.kernel.org/show_bug.cgi?id=60857
--- Comment #4 from Stuart Foster smf.linux@ntlworld.com --- (In reply to Alex Deucher from comment #3)
Can you bisect? Also just to be sure, the monitor in qestion is connected to the integrated chip, not the dGPU correct? Does disabling dpm fix the issue?
The monitor is connected to the integrated chip on the motherboard (760G [Radeon 3000]) Disabling dpm does fix the problem (radeon.dpm=0 on lilo append line, the patch is still included).
dmesg now reports:
[drm] radeon: power management initialized
as apposed to
[drm] radeon: dpm initialized
There is no mention of any power mangement on the RV516 [Radeon X1300/X1550 Series] is that correct ?
The problem is present in vanilla 3.11-rc1.