I have a laptop with an intel and nvidia graphics adapter, so I need to use bumblebee if I want to run 3d apllications. Everything was working until I upgraded from kubuntu 12.10 to 13.4 today. Now I get the following error:
$ optirun ufo
[ 784.430792] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) No devices detected.
[ 784.430821] [ERROR]Aborting because fallback start is disabled.
I've found a thread
that says I need to change the Driver and KernelDriver settings in "/etc/bumblebee/bumblebee.conf", but after I did that I still get the same error.
Does anyone know of a fix for this problem?
I've fixed the problem following the instructions in this
thread. Scroll down until you reach the part where they talk about setting BusID, I think this is a better option than reverting to an older xserver.