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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/856312 Title: Cant set resolution with two monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/856312/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
