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 Ubuntu-X, 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 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/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
