This appears to happen in Lucid as of 4/21/2010. Only by changing the maximum screen size via Virtualsize in xorg.conf can Xrandr appropriately setup multiple screens.
-- xrandr reports incorrect maximum screen size https://bugs.launchpad.net/bugs/449867 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
