Problem with optirun after update (Bumblebee).

Hey guys…

I don’t know exactly when optirun stopped but, yesterday I was checking my system and some problems appeared:

[leonardo@alice ~]$ optirun glxspheres 
  546.706630] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
  546.706654] [ERROR]Could not connect to bumblebee daemon - is it running?

I saw the new bumblebee installation guide in one of the forum threads and tried to follow the instructions without uninstalling my bumblebee. Nothing worked.

How can I solve this problem ?

thank you !

Some helpfull things:

[leonardo@alice ~]$ sudo lspci | egrep 'VGA|3D'
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 960M] (rev ff)