Optirun falha no Ubuntu 17.10 com nvidia geforce 940MX

Question

Eu tenho um laptop com uma GPU nVidia Geforce 940MX dedicada. Eu instalei os pacotes de bumblebee seguindo os passos escritos no link mas sempre que eu quero executar optirun glxgears ele falha com a mensagem

[  663.222353] [ERROR]Cannot access secondary GPU - error: Could not load GPU driver

[  663.222380] [ERROR]Aborting because fallback start is disabled.

Eu tentei seguir as instruções no /etc/bumblebee/xorg.conf.nvidia onde diz para inserir o BusID correto, mas o lspci | egrep 'VGA|3D' fornece a seguinte saída %código% que é o mesmo BusID que é especificado no arquivo xorg.conf.nvidia. Eu não sei como corrigir esse problema. No manjaro linux funcionou perfeitamente com os drivers proprietários, mas no Ubuntu não parece funcionar.

Se alguém estiver interessado, aqui está o meu arquivo xorg.conf.nvidia:

Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false"
    Option      "AutoAddGPU" "false"
EndSection

Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nvidia"
    VendorName  "NVIDIA Corporation"

#   If the X server does not automatically detect your VGA device,
#   you can manually set it here.
#   To get the BusID prop, run 'lspci | egrep 'VGA|3D'' and input the data
#   as you see in the commented example.
#   This Setting may be needed in some platforms with more than one
#   nvidia card, which may confuse the proprietary driver (e.g.,
#   trying to take ownership of the wrong device). Also needed on Ubuntu 13.04.
    BusID "PCI:01:00:0"

#   Setting ProbeAllGpus to false prevents the new proprietary driver
#   instance spawned to try to control the integrated graphics card,
#   which is already being managed outside bumblebee.
#   This option doesn't hurt and it is required on platforms running
#   more than one nvidia graphics card with the proprietary driver.
#   (E.g. Macbook Pro pre-2010 with nVidia 9400M + 9600M GT).
#   If this option is not set, the new Xorg may blacken the screen and
#   render it unusable (unless you have some way to run killall Xorg).
    Option "ProbeAllGpus" "false"

    Option "NoLogo" "true"
    Option "UseEDID" "false"
    Option "UseDisplayDevice" "none"
EndSection