And this shows the problem really is originating in the Nvidia driver:
$ xrandr --verbose Screen 0: minimum 8 x 8, current 640 x 480, maximum 16384 x 16384
So the GPU has no CRTCs.
And this shows the problem really is originating in the Nvidia driver:
$ xrandr --verbose
Screen 0: minimum 8 x 8, current 640 x 480, maximum 16384 x 16384
So the GPU has no CRTCs.