For my case, I think it was related to the proprietary ATI drivers (fglrx), suggested by Ubuntu after installing. I said go ahead, and installation failed, but I think it still managed to install enough so that the proprietary drivers were used after the next boot. That's when I got the error mentioned in this bug. Using the ATI supplied tools (amdccc) etc, I was able to extend the desktop, but only using Xinerama. I have an older ATI card (RV730), which may be related, as I chatted with another ATI user with a more recent card that claimed he was able to extend his desktop with amdccc without resorting to Xinerama.
My solutions was to thoroughly clean the system of fglrx (using methods found through googling) and restart with the open source drivers, when everything seems to be working fine again (desktop extended - no problem). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/856312 Title: Cant set resolution with two monitors Status in “gnome-control-center” package in Ubuntu: Incomplete Bug description: When trying to configure my two screens I get the message : required virtual size does not fit available size: requested=(3129, 1050), minimum=(320, 200), maximum=(1680, 1680) The two screens have different sizes ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: gnome-control-center 1:3.1.92-0ubuntu1 ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4 Uname: Linux 3.0.0-11-generic x86_64 NonfreeKernelModules: fglrx wl ApportVersion: 1.23-0ubuntu1 Architecture: amd64 Date: Thu Sep 22 08:20:33 2011 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110919) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) usr_lib_gnome-control-center: deja-dup 19.92-0ubuntu1 gnome-bluetooth 3.1.4-0ubuntu2 indicator-datetime 0.2.95-0ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/856312/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
