Luca Boccassi wrote: > Could you please try to change to KernelDriver=nvidia and restart?
so I did, but nothing changed... I forgot to mention that when I use optirun the nvidia module is loaded and the discrete card is turned on, as testified by /proc/acpi/bbswitch and also by the temperature of the exausts of my pc... and this was true even when i had KernelDriver=nvidia-current in bumblebee.conf. To switch off the card I have to rmmod the nvidia module. With respect to the PID that "does not belong to any known session", it is the same across different invocation of optirun, even from different shells, and if I try the command sudo ps x | grep nnnn I cannot see such a process on my system. I even tried to see if the PID remains the same if I log out from my session and try to run optirun from a new session, but it seems that gdm locks itself when it's run a second time so I cannot confirm this suspicion of mine Regards, gb