I have similar issue Ubuntu 14.04 LTS (14.04.4 kernel 4.2.0-30-generic) Nvidia geforce 940M Tried different driver version (331,346,352,355,361) from different sources.
PPA: xorg-edgers - black screen PPA: graphics-drivers - infinite login loop http://www.nvidia.pl/download/driverResults.aspx/98425/pl - black screen and 352 driver from Ubuntu 14.04.4 CD... - this pretends to work on kernel 4.2.0-27-generic, but when you want to switch to performance mode you will get: Error: alternatives are not set up properly Error: nvidia mode can't be enabled And moreover any tool/application using 3D gl graphics is not using nvidia gpu :-( https://devtalk.nvidia.com/default/topic/921922/linux/nvidia-getforce- gtx-950m-gddr3-black-screen-or-login-loop-when-install-nvidia- driver/?offset=2#4828839 -- 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
