desktop-packages team mailing list archive

[Doug McMahon <1507676@xxxxxxxxxxxxxxxxxx>]

Well then hopefully you can get it so this change to modesetting  can be reverted & one isn't forced to get screen to sleep then awake.
My whole point was that this report is claiming that the switch from Intel to Nvidia fails which is not true is any respect. 
It's purely a matter of no visible display until the display is put to sleep,  the awakened

If the bug reporter had walked away from machine for 300 sec.'s, then
pressed  a key or moved a mouse they'd have gotten a visible  working
session under nvidia.

examples, ect. where in prior reports - 
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1501041
https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1492864

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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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