Bug#497209: xserver-xorg-video-radeon: Strange behaviour using dvi-port only with Radeon 9200 pro

[Brice Goglin]

Felix Schueller wrote:
> I can simply switch to an tty and call xrandr there. But, i think you
> want the output of "xrandr -display :0 -q" because the output without
> '-q' is empty in both cases. The output ist attached.
>   

The chosen rate is different in these xrandr output, 59.9 when working,
while 60.0 when not working. Maybe your monitor doesn't like 60.0.

Can you try:
1) plugin the VGA cable so that X works
2) changing the rate from 59.9 to 60.0 with xrandr --rate

That said, it looks like having the VGA output detected with preferred
rate = 59.9 would cause the DVI chosen rate to change from 60 and 59.9.

Brice