I've got a Dell Latitude E6530 here which is Nvidia Optimus enabled. In Ubuntu 12.04 I installed:
nvidia-319
- Bumblebee stable PPA version
3.2.1-1~preciseppa4
installed with the instruction from https://wiki.ubuntu.com/Bumblebee - Raring hardware enablement kernel+Xorg (by default on 12.04.3 new install)
Works perfectly fine for one boot after installation. Each boot following the first will result in a black screen. I've nailed it down to a resetting option in the BIOS of the Dell machine: after installing Bumblebee and booting for the first time with it, it will disable it in the BIOS. The option "Enable Optimus" is unticked, magically.
This means I have to re-enable Optimus in the BIOS before I boot Ubuntu every single time. Running an OS without Bumblebee does not reset the Optimus setting in the BIOS. How can I prevent Bumblebee from touching the settings in the BIOS?