Nvidia optimus KMS doesn't work

Question

Hi all! I am on an HP Notebook with Nvidia Optimus. Displays are connected to the intel gpu, and I am using bumblebee+proprietary nvidia driver. The intel driver is i915.
Since the system is using the intel card to manage the screens, I though I could use KMS. But referring to this post on stack exchange:
http://superuser.com/questions/223094/h … ms-enabled
and also to the fact that plymouth doesn't work at boot (but strangely it works on shutdown) I found out that KMS does not work. Also, if i add "i915" to MODULES
in /etc/mkinitcpio.conf not only it still doesn't work, but also tty's do nothing. Gnome starts, but if I do CRTL+ALT+F2 or similars I only see a blinking underscore and no login screen. And if I try to write something nothing happens.
So the answer is:
If I use i915 as X gpu, but I have installed proprietary driver for use with Bumblebee, can I turn KMS on?
Last edited by tacchinotacchi (2014-08-18 12:58:08)

Answer 1

Hi, Mazima. The MBP can't use both GPUs at once — it always uses one or the other. If you've switched to the Higher Performance setting in Energy Saver and can play the game at all, your 9600M GT is working. But if it hasn't made a dramatic difference in frame rates when you're playing WoW, there's something else going on.
IS WoW the only thing running on your computer? If not, quit all other applications and see whether that helps with your frame rates. Experiment with different settings within the game. And see whether you can find any useful information in WoW's own forums, assuming there are forums related to it.