@Alberto Milone I did an update today and updated ubuntu-drivers-common. I tried installing nvidia-331 again with all its dependencies (installed nvidia-prime and other stuff together) and rebooted. I didn't even see a login screen, the computer hanged in a black screen. I wasn't able even to switch to a terminal with Ctrl-Alt-F1 to provide you the logs that you requested. I rebooted with the previous kernel and took a copy of the logs. I don't know if they are useful to you, but take them anyway.
** Attachment added: "debug.tar.gz" https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-304-updates/+bug/1365695/+attachment/4207275/+files/debug.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1365695 Title: No longer able to use GUI after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-304-updates/+bug/1365695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs