This is because of Optimus and a possible faulty installation of nvidia
driver. Please try a clean install and use Bumblebee.
** Changed in: nvidia-graphics-drivers (Ubuntu)
Status: New => Invalid
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which is subscribed to nvidia-graphics-drivers in Ubuntu.
https://bugs.launchpad.net/bugs/1085998
Title:
Complete system crash after installing ubuntu 12.10 on dell xps 15
(nvidia optimus)
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