Had problem on Lenovo W520 with Kubuntu 14.04 to get external VGA AND LVDS
working.
With Optimus no chance.
Had to switch to discrete graphics in Bios.
Nvidia drivers nogo.
Switched to Nouveau i.e. reinstalled the driver.
But than had problem with brightness on LVDS.
Finally figured out working
Not nice but https://bugs.launchpad.net/ubuntu/+source/xorg-
server/+bug/1326688/comments/6 works for me.
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https://bugs.launchpad.net/bugs/1326688
Title:
Can't disable panning on multip
Since upgrade to 14.04 can not use external monitors due to this panning
problem on my Lenovo W520
$ dpkg --get-selections | grep nvidia
nvidia-343 install
nvidia-343-uvm install
nvidia-opencl-icd-343 install
nvidia-
