I got this too, by "activating" 304 with jockey and then, without restarting, activating 310 instead. Next reboot, X failed. Running 'startx' produced this:
Error: API mismatch: the NVIDIA kernel module has version 304.48, but this NVIDIA driver component has version 310.14. Please make sure that the kernel module and all NVIDIA driver components have the same version. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1082389 Title: nvidia-experimental loads wrong kernel module To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-experimental-310/+bug/1082389/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs