ati xrandr: cannot find crtc for output DVI-0
Alex Deucher
alexdeucher at gmail.com
Mon Aug 27 06:38:56 PDT 2007
On 8/27/07, Jan Dittmer <jdi at l4x.org> wrote:
> Given ati driver 6.7.192 and libxrandr 1.2.1 (Debian experimental)
> I cannot enable the DVI-0 output using:
>
> $ xrandr --output DVI-0 --right-of VGA-0 --mode 1280x1024 --rate 60
> xrandr: cannot find crtc for output DVI-0
>
> $ xrandr -q
> Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2560 x 1024
> VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm
> x 301mm
> 1280x1024_60.00 60.0*+
> 1600x1024 60.0
> 1280x1024 59.9
> 1280x960 60.0
> 1280x800 60.0
> 800x600 56.2
> 640x480 60.0 59.9
> DVI-0 connected (normal left inverted right x axis y axis)
> 1280x1024 75.0 59.9 60.0
> 1152x864 75.0 74.8
> 1024x768 75.1 70.1 60.0
> 832x624 74.6
> 800x600 72.2 75.0 60.3 56.2
> 640x480 75.0 72.8 66.7 60.0
> 720x400 70.1
> S-video connected 800x600+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
> 800x600 59.9*+ 60.3
radeons only have two crtcs and you are trying to enable more an two
monitors. you'll need to turn off S-video in order to turn DVI on.
xrandr --output S-video --off
xrandr --output DVI-0 --auto
If you don't have a tv plugged in than I'm guessing you probably have
an analog monitor on DVI-0 which is causing the tv to detect load (TV
and DVI port share the same dac).
Alex
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