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
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https://bugs.launchpad.net/bugs/624684
Title:
[arrandale] Lenovo U460 HDMI doesn't work
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https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/624684/+subscriptions
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