Every time their is a Linux-ck upgrade, it turns on discrete graphic card controlled via Bumblebee/Nvidia Optimus. I use linux-ck repo.
sudo bumblebeed start FATAL: Module bbswitch not found. [ERROR]Module bbswitch could not be loaded (timeout?) [WARN]No switching method available. The dedicated card will always be on. [ERROR]Daemon already running, pid 703
BBSwitch is installed but module can't be loaded. Re-installing and rebooting BBSwitch fixes the problem.
I could be wrong--I only tried playing with Bumblebee for a minute last weekend, and haven't tried seriously setting it up--but I think you need to use the nvidia-bumblebee package from the AUR, as nvidia-ck relies on the nvidia-utils package from the [extra] repo (which isn't compatible with Bumblebee).