desktop-packages team mailing list archive

[Doug McMahon <1507676@xxxxxxxxxxxxxxxxxx>]

A "regression in the intel driver" doesn't seem to explain why this was not an issue in a gnome session, nor to the fact that  - 
xset dpms force off 
xset dpms force on 
returned display  both in greeter & session 
(and nvidia driver loaded & worked fine, with or without a visible display.

you  'fixed' the issue but maybe not for the correct reason

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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:
  Fix Released
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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