I’m running OpenSuSE 11.0 on a Dell D630 with a Intel 965 graphics. Everything is working fine (dualhead, Xinerama, 1280x800 on the laptop screen, etc), except that 1024x768 is the max resolution I’ve been able to attain on the external monitor. http://forums.opensuse.org/images/smiliesnew/sad.png
The xorg.conf file has been modified to include Virtual settings, and the mode, 1280x1024, in the Screen, Display subsection.
I’ve renamed and run sax2 from init 3 multiple times without being able to change the remote screen any higher than 1024x768.
This is frustrating because I know it will work with the higher resolution…it did work properly once before, but lost the settings when I attempted to work with OpenSuSE 11.1 for a few days.
I have the same problem. Unfortunately, it appears to be a common problem with Intel Integrated Graphics. I have not managed to get more than 1024x768 on my external monitor (which is capable of 1600x1200).
I am half thinking of trying Ubuntu. I have always had reasonable success with Ubuntu and dual monitors.
Post your current xorg.conf file. Have you tried manual mode entries for external monitor. I have heard that EDID does not work correctly for all hardware, so often the maximum resolution (especially for external monitors) is not used. I’m assuming it is connected via VGA port? What does xrandr -q report (with ext monitor plugged in)?
Have a look at this page for a possible insight on this.