I am attaching a couple screenshots that can give an idea of what is happening.
This first is the Gnome display prefs app showing what I attempted to make in the next attachment ** Attachment added: "display_2048x768.png" http://launchpadlibrarian.net/36197526/display_2048x768.png -- Setting up dual-head of exactly 2048 pixels wide ends up with a black screen. Setting it up with more than 2048 pixels crashes X https://bugs.launchpad.net/bugs/486056 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