resolved by performing these steps: Re: remove xrandr 1.2 and let ati setup my screens I ran into the same problem last week and was just trying to remember how I did it because a coworker wanted to know. So for your and his benefit...
Edit /etc/ati/amdpcsdb In the section labeled [AMDPCSROOT/SYSTEM/DDX] add this: Code: EnableRandR12=Sfalse Also, in /etc/X11/xorg.conf in the "Device" section add: Code: Option "EnableRandR12" "false" Hope that helps. thanks to ToeBee at the Ubuntu forums. then. run catalyst control manager in administration mode and set desktops to single desktop (multiple display(s)) - should be the bottom option. You then need to reboot to save changes. At the terminal type: sudo aticonfig --dtop=horizontal and follow the prompts. You should get an error message. After this you can then change to a multi display desktop by rebooting and changing settings through the catalyst control center. Not sure all the above is needed, but they are what i did to resolve the issue. ** Changed in: xorg (Ubuntu) Status: New => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/914713 Title: virtual display memory too small, primary display resolution incorrect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/914713/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs