Your laptop is known as a hybrid machine with two GPUs. The internal display (and typically VGA) is connected to the weaker integrated GPU, whereas the HDMI is connected to the discrete GPU. We are only just beginning to catch up with Windows in enabling multi-GPU / multi-head configurations - in the meantime you have to either make a choice about which GPU to use, or to use something like bumblebee.
Note that in raring, we have the initial enabling of multi-GPU support. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/624684 Title: [arrandale] Lenovo U460 HDMI doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/624684/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp