Configuration

Configuration of both Bumblebee daemon (bumblebeed) and client (optirun) are made on a single file located on $CONFDIR/bumblebee/bumblebee.conf, depending on how you installed Bumblebee, CONFDIR could be /usr/local/etc or /etc. The file bumblebee.conf has comments explaining the settings. The format is described at http://freedesktop.org/wiki/Specifications/desktop-entry-spec. Most notably, you should not use quotes around values.

Using Nouveau driver

If you're using a very, very recent nouveau driver which supports your card, you can use the nouveau driver by setting the Driver setting to nouveau:

[bumblebeed]
Driver=nouveau
...
[driver-nouveau]
KernelDriver=nouveau
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau
...

Using Nvidia driver

The NVIDIA driver needs more configuration. Note that XorgModulePath is comma-separated.

[bumblebeed]
Driver=nvidia
...
[driver-nvidia]
KernelDriver=nvidia
Module=nvidia
LibraryPath=/path/to/nvidia/libraries:/path/to/32-bit/libraries/if/applicable
XorgModulePath=/path/to/dir/with/nvidia_drv.so/in/it,/path/to/default/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
...

On Ubuntu and Mandriva, the value for Module is nvidia-current, not nvidia.