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 Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1052000 Title: external monitor is invisible through vga-hdmi adaptor Status in “xserver-xorg-video-intel” package in Ubuntu: Confirmed Bug description: When I plug external vga monitor into hdmi2vga converter supplied with asus zenbook UX31A it's not detected at all. xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767 eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm 1920x1080 60.0*+ 59.9 40.0 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) versions: xserver-xorg-video-intel 2.20.7+git20120912.e5f13780-0ubuntu0sarvatt~precise ubuntu 12.04 x86_64 with latest backports, kernle 3.5.0-13-generic #13-Ubuntu SMP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1052000/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
