The dongle supplied with the Zenbook Prime (UX31A) is a mini-VGA to VGA cable, no HDMI involved. I haven't tried hooking up an external monitor with stock Quantal, but with the xorg-edgers PPA, I have found no problems hooking up a monitor with said dongle.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1052000 Title: external monitor is invisible through vga-hdmi adaptor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1052000/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs