I believe this probably is not jockey's fault but rather nvidia-current, based on the contents of the file (seen from dupe bug 981048):
$ cat nvidia-current-updates_hybrid.conf # This file was installed by nvidia-current-updates # Do not edit this file manually blacklist nouveau blacklist lbm-nouveau alias nouveau off alias lbm-nouveau off prevents nouveau from working and as such the system cannot boot ** Also affects: nvidia-graphics-drivers (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/956091 Title: Jockey does not remove 'nouveau' driver blacklist when deactivating nvidia driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jockey/+bug/956091/+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