Setting resolution of external monitor

Matthias Hopf mhopf at
Wed May 20 06:18:33 PDT 2009

On May 20, 09 11:49:30 +0200, Éric Piel wrote:
> Op 20-05-09 09:06, Oliver Block schreef:
> > The laptop display has a native resolution of 1680x1050. The external
> > screen as a (maximal) resolution of 1920x1080.
> > Can someone explain me why I cannot select 1920x1080 as a resolution?
> > Any hints what to do?
> From what I understand you want "panning". I would do it with this command:
> xrandr  --output PANEL --mode 1680x1050 --panning 1920x1080

Not necessarily. Panning is certainly helpful, but the driver doesn't
even detect the higher resolution.

Given you have a dead old version of radeonhd, please try the current
1.2.5 one. It is also probably that you stumble over an randr bug in the
Xserver, as 1.4.2 is also ancient. To get more informative output in the
log also try starting X with -logverbose 7.

If the newer versions don't help, try posting on the radeonhd mailing
list - see


Matthias Hopf <mhopf at>      __        __   __
Maxfeldstr. 5 / 90409 Nuernberg   (_   | |  (_   |__          mat at
Phone +49-911-74053-715           __)  |_|  __)  |__  R & D

More information about the xorg mailing list