I found a "workaround" that I should have tried earlier: reinstall xkit:
sudo apt-get --reinstall install python-xkit
You might also reinstall jockey if it does not work. This problem happened when I upgraded from alpha4 to alpha5: I had a fresh install of alpha 4 and then updated everything one day after alpha5 was released.
After reinstalling xkit and restarting the x server, I can confirm that the correct driver was activated and now everything works well (nvidia XServer Settings could configure TwinView and correct resolution).
One last thing: I got a notification that the jockey-backend crashed after I activated the driver. The jockey UI was still working and like I said, after the xserver restart, everything worked well.
I found a "workaround" that I should have tried earlier: reinstall xkit:
sudo apt-get --reinstall install python-xkit
You might also reinstall jockey if it does not work. This problem happened when I upgraded from alpha4 to alpha5: I had a fresh install of alpha 4 and then updated everything one day after alpha5 was released.
After reinstalling xkit and restarting the x server, I can confirm that the correct driver was activated and now everything works well (nvidia XServer Settings could configure TwinView and correct resolution).
One last thing: I got a notification that the jockey-backend crashed after I activated the driver. The jockey UI was still working and like I said, after the xserver restart, everything worked well.