On Sat, 18 Dec 2010 14:06:25 +0900, Dietrich Bollmann wrote:
> Since a couple of weeks my dual monitor setup fails:
>
> # xrandr --output LVDS --output VGA --right-of LVDS --primary
>
> xrandr: Failed to get size of gamma for output default warning: output
> LVDS not found; ignoring warning: output VGA not found; ignoring
Review your "/var/log/Xorg.0.log" file to find out what outputs is
detecting Xorg. You can also run "xrandr -q" to discover what is
connected.
Note that LVDS and VGA names can be different if you are using a KMS
enabled intel video driver (LVDS1/VGA1).
> xrand without parameters produces the following output:
>
> # xrandr
>
> xrandr: Failed to get size of gamma for output default Screen 0: minimum
> 640 x 480, current 1280 x 1024, maximum 1280 x 1024 default connected
> 1280x1024+0+0 0mm x 0mm
> 1280x1024 0.0*
> 1024x768 0.0
> 800x600 0.0
> 640x480 0.0
>
> What can I do?
It seems the external display is not being detected. Your xorg log should
contain more data.
> I erased the /etc/X11/xorg.conf as x windows didn't start anymore and
> this was the only way I found to make it start again and get back to
> work. Trying after to reconfigure xserver-xorg with
> dpkg-reconfigure xserver-xorg
> didn't recreate /etc/X11/xorg.conf. Could this be related?
locate xorg.conf
After running the above command ("dpkg-reconfigure xserver-xorg"), your
"xorg.conf" file should be created under root's home (/root/
xorg.conf.new), if you want to make use of it, you'll have to move it to
the right folder.
Greetings,
--
Camaleón
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