I just installed 11.10 rc and I changed my ATI settings (dual monitor) and after reboot I cant use dual monitor any more
It seems the "Display" app in ubuntu wont allow me to use dual monitors. I get the error
"required virtual size does not fit available size: requested=(2304, 768), minimum=(320, 200), maximum=(1280, 1280)"
and because I can't get both monitors active (except mirrored) I can't use dual display in ATI ccc
Update. not exactly sure what caused it but the problem was xorg.conf
seems the old xorg.cofg was renamed to xorg.conf.dist-upgrade-201110070100
and the new xorg.conf only had in it
so I restored the old xorg.conf and everything works.
Identifier "Default Screen"