https://bugzilla.kernel.org/show_bug.cgi?id=98751
Andy Furniss adf.lists@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |adf.lists@gmail.com
--- Comment #9 from Andy Furniss adf.lists@gmail.com --- I just hit this one with my R9270X.
Reverting "drm/radeon: adjust pll when audio is not enabled" fixes it.
For me starting with DVI on and enabling HDMI results in loosing DVI. If I off then auto DVI it comes back but HDMI goes off, repeat for HDMI = DVI off again and so on.
I did find a way to get both working = xset dpms force off then coming out of dpms both will come on an behave as if nothing was ever wrong (I can flip either on/off without affecting the other).