I am affected by the same bug and followed this post to change the xorg.conf settings: http://ubuntuforums.org/showthread.php?t=1883119
So the text used is: SubSection "Display" Depth 24 Virtual 2304 2048 EndSubSection This did not help. Does xorg.conf not have any effect in 12.04? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/962018 Title: Dual Monitor (non-mirored) wont work since Update 9th March To manage notifications about this bug go to: https://bugs.launchpad.net/fglrx/+bug/962018/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp