(In reply to Benjamin Hodgetts from comment #0)
> dc=0 (forced)
> 	HDMI-A-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
> 0mm x 0mm
> 	   1920x1080     60.00*+  50.00    59.94    30.00    25.00    24.00   
> 29.97    23.98  

When you say "forced" what does that mean?  Do you have to specify an EDID
override on the kernel command line?  Or are you saying everything is detected
properly with dc=0 even when the display is turned off?