This is a pretty nasty one. All I did was updating my system as I do on a regular basis and boom. 4h of cursing against the Ubuntu devs. (not really)
Purging Bumblebee solved it for me. Good thing I found this via askubuntu, just as I was about to ask for help. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1265570 Title: nvidia-331 update installs bumblebee [xorg-edgers] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1265570/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
