eamon@eamon-desktop:~$ sudo nvidia-glx-config enable
X Error: BadDevice, invalid or uninitialized input device 154
  Major opcode:  143
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 154
  Major opcode:  143
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 154
  Major opcode:  143
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 154
  Major opcode:  143
  Minor opcode:  3
  Resource id:  0x0
Failed to open device

Error: your X configuration has been altered.
This script cannot proceed automatically. If you believe that this
not correct, you can update the md5sum entry executing the following
command:
md5sum /etc/X11/xorg.conf | sudo tee /var/lib/x11/xorg.conf.md5sum
otherwise edit manually /etc/X11/xorg.conf to change the Driver section
from nv to nvidia.
eamon@eamon-desktop:~$