Same here, in a 14.04.5 laptop with both Intel HD Graphics 4400 and NVIDIA GeForce GT 750M.
After removing all 'nvidia*' packages it boots again to the graphics environment. I have also tried to install again the 'nvidia-367' package. Before rebooting, 'nvidia-prime' says the default is for 'nvidia', so I have changed to 'intel' instead ("prime-select intel", at terminal). Then after reboot it goes into the desktop as usual, using the Intel card and also with all the nvidia modules loaded. However OpenGL does not work anymore in that case (X fails to load two of the DRI modules on startup, dunno why). So I went back and purged all nvidia packages. Note: I've also tried the package 'nvidia-361' that comes from the CUDA 8.0 repository from NVIDIA, but got the same black screen (still being able to switch to a text-mode terminal). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/1639520 Title: nvidia graphics drivers 367.57-0ubuntu0.14.04.1 prevents gnome from launching Status in nvidia-graphics-drivers package in Ubuntu: Confirmed Bug description: Release : Ubuntu 14.04.5 LTS Package Version : 367.57-0ubuntu0.14.04.1 nvidia graphics drivers version 367.57-0ubuntu0.14.04.1 was published 2 days ago on 11/3 ( https://launchpad.net/ubuntu/+source/nvidia- graphics-drivers-367/367.57-0ubuntu0.14.04.1 ). I installed the update on 11/4 (see apt log below). Today on 11/5 I rebooted my machine. Upon booting when the graphical UI is launched the screen is black. I knew that though I had no display I was at the graphical login prompt as I heard the ubuntu sound that's played when the login prompt is presented. I rebooted into an older kernel version and got the graphical UI to render such that I could log in. Upon logging in (as myself or as guest) an error message was flashed and I'm returned to the login prompt. In looking at /var/log/syslog each time this happens I'm getting the error gnome-session[4575]: CRITICAL: We failed, but the fail whale is dead. Sorry.... After attempting other fixes I found the fix. I removed the nvidia drivers from the command line with apt-get remove --purge nvidia* This resolved the problem. I then went into the graphical proprietary drivers UI and selected nvidia 367 which re-installed nvidia drivers 367.57-0ubuntu0.14.04.1 I rebooted and the black screen occurred again. At this point the cause/effect of the nvidia drivers was apparent. I again removed all nvidia drivers with the apt-get remove line above. I rebooted and again my system works correctly. Expected results : To be able to log into Ubuntu after accepting the upgraded nvidia drivers Actual results : The new version of nvidia drivers prevents the display from working or gnome-session from working. I'm happy to provide any additional diagnostic information that anyone would like, just ask for files or for me to run commands and get you output. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/1639520/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp