Hey guys, I'm running an amd64 Gentoo system, with video provided by an on-board ATI chip set. The onboard graphics provides one DVI output and one VGA output.
Recently I upgraded my Xorg server to version 1.12.1. (I wanted the newer version so I could use a certain development library.) The upgrade was quite the ride, as I had to rebuild my graphics and input drivers. Anyway, I got graphics working again after I rebuilt the freedesktop ATI video driver.
However, before the upgrade I was able to go into dual screen Xinerama mode with this command:
xrandr --output VGA-0 --auto --left-of DVI-0
But now the command fails with:
xrandr: screen cannot be larger than 1280x1280 (desired size 2304x1024
So I am stuck in mirror mode, which is lame and pointless. xrandr recognizes both screens, but won't let me put them side by side:
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1280 x 1280
VGA-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
1280x1024 60.0 + 75.0
1024x768 75.0* 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 75.0 72.8 66.7 59.9
DVI-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 370mm x 230mm
I've attached the Xorg.log as well, hoping that will help.