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[Alberto Milone <alberto.milone@xxxxxxxxxxxxx>]

** Also affects: ubuntu-drivers-common (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => In Progress

** Changed in: xserver-xorg-video-intel (Ubuntu)
   Importance: Undecided => Critical

** Changed in: xserver-xorg-video-intel (Ubuntu)
     Assignee: (unassigned) => Alberto Milone (albertomilone)

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https://bugs.launchpad.net/bugs/1507676

Title:
  Nvidia-Prime not switching from intel to nvidia leading to a black
  screen

Status in ubuntu-drivers-common package in Ubuntu:
  New
Status in xserver-xorg-video-intel package in Ubuntu:
  In Progress

Bug description:
  STEPS:
  1. Install 15.10 on a laptop that supports optimus nvidia/intel hybrid graphics
  2. Install nvidia and nvidia-prime
  3. Open nvidia settings
  4. Switch to nvidia
  5. Log out
  6. Hear the login drums

  EXPECTED:
  I expect to see the lightdm login page

  ACTUAL:
  You are presented with a black page

  TEMP WORKAROUND:
  1. Tap ctrl-alt-f1
  2. login
  3. run sudo prime-select intel
  4. run sudo service lightdm restart
  5. System is back running on the intel stack alone.

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