This happened on my Dell M3800 with the Optimus Nvidia GPU and nvidia- prime when updating to the 14.04.5 LTS HWE.
The workaround I used was to force the modesetting driver in xorg.config for the Intel GPU, and not allow changes to xorg.config (see https://vxlabs.com/2015/02/05/solving-the-ubuntu-14-04-nvidia-346 -nvidia-prime-black-screen-issue/). An updated ubuntu-drivers-common to make gpu-manager use the modesetting driver will be most helpful. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1507676/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
