I have a fresh installation of ubuntu gnome 15.10 and I cannot get bumblebee optirun to work. My laptop has the optimus setup with Intel and Nvidia graphics cards. I get the following error trying to use optirun:
~$optirun firefox
[ 4580.965189] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) [drm] KMS not enabled
[ 4580.965358] [ERROR]Aborting because fallback start is disabled.
I thought KMS was enabled by default with newer kernels but I'm not certain of this. Do I need to use bbswitch first?
Remove bumblebee and use nvidia-prime to switch between the two graphics solutions instead.
First identify your NVIDIA graphics hardware - open a terminal and execute:
lspci -k | grep -EA2 'VGA|3D'
Search for available drivers on the NVIDIA Drivers website.
Update :
Uninstall every NVIDIA related software ...
When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.
When the login screen appears press Ctrl+Alt+F1.
Enter user name and password - then execute :
sudo apt-get purge nvidia* bumblebee
sudo reboot
Update :
Install the latest stable NVIDIA drivers ...
When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.
When the login screen appears press Ctrl+Alt+F1.
Enter user name and password - then execute :
sudo apt-get update
sudo apt-get install nvidia-352 nvidia-prime
sudo reboot
Use the NVIDIA X Server Settings application (Prime Profiles) to switch between the two GPU's.
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