I have Kali 2.0 installation with 4.4.0 kernel.

I have followed this guide.
After step 14 (reboot) I had this message:

Code:
root@kali:~# optirun glxspheres64
[   87.628541] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
[   87.628646] [ERROR]Could not connect to bumblebee daemon - is it running?
root@kali:~# service bumblebeed restart
root@kali:~# optirun glxspheres64
[  105.254132] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) 

[  105.254223] [ERROR]Aborting because fallback start is disabled.
/etc/bumblebee/bumblebee.conf

Code:
[bumblebeed]
...
NoEcoModeOverride=false
Driver=nvidia
XorgConfDir=/etc/bumblebee/xorg.conf.d
[optirun]
Bridge=auto
VGLTransport=proxy
PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus:/usr/lib/primus:/usr/lib32/primus
AllowFallbackToIGC=false
...
[driver-nvidia]
KernelDriver=nvidia-current
...
[driver-nouveau]
...
/etc/bumblebee/xorg.conf.nvidia
Code:
Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false"
    Option      "AutoAddGPU" "false"
EndSection

Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nvidia"
    VendorName  "NVIDIA Corporation"
    BusID "PCI:01:00:0"
    Option "ProbeAllGpus" "false"
    Option "NoLogo" "true"
    Option "UseEDID" "false"
    Option "UseDisplayDevice" "none"
EndSection
lspci
Code:
00:02.0 VGA compatible controller: Intel Corporation Device 22b1 (rev 21)
01:00.0 3D controller: NVIDIA Corporation GK208M [GeForce 920M] (rev a1)
I have done all that this guide suggested, but still I can't run optirun. It just can't...