The end of your Xorg.0.log files indicates that X is crashing. Could you get a full backtrace with any of the methods described at https://wiki.ubuntu.com/X/Backtracing ?
Also, is the crash triggered when the Virtual part is not commented out even if an external monitor is not connected, or do you need the external monitor connected as well? -- [i945] (UXA) 945GM [8086:27a2] (rev 03): Resolution width is limited to 2048 https://bugs.launchpad.net/bugs/382327 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