Just to point out this line of interest near the top of your Xorg.0.log: (==) Using config file: "/etc/X11/xorg.conf.failsafe"
This is normally due to broken Xorg config -- New kernel brakes nvidia, old kernel fine https://bugs.launchpad.net/bugs/244798 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs