optirun prints 'Failed to load module "nouveau"' although module nouveau is loaded

[krichter722]

Running optirun -vv --debug bash results in

[  811.200189] [DEBUG]Reading file: /etc/bumblebee/bumblebee.conf
[  811.200340] [INFO]Configured driver: nouveau
[  811.200465] [DEBUG]optirun version 3.2.1 starting...
[  811.200473] [DEBUG]Active configuration:
[  811.200475] [DEBUG] bumblebeed config file: /etc/bumblebee/bumblebee.conf
[  811.200478] [DEBUG] X display: :8
[  811.200481] [DEBUG] LD_LIBRARY_PATH: 
[  811.200484] [DEBUG] Socket path: /var/run/bumblebee.socket
[  811.200486] [DEBUG] Accel/display bridge: auto
[  811.200490] [DEBUG] VGL Compression: proxy
[  811.200492] [DEBUG] VGLrun extra options: 
[  811.200497] [DEBUG] Primus LD Path: /usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus
[  811.200667] [DEBUG]Using auto-detected bridge primus
[  811.316870] [INFO]Response: No - error: [XORG] (EE) Failed to load module "nouveau" (module does not exist, 0)

[  811.316890] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Failed to load module "nouveau" (module does not exist, 0)

[  811.316912] [DEBUG]Socket closed.
[  811.316930] [ERROR]Aborting because fallback start is disabled.
[  811.316939] [DEBUG]Killing all remaining processes.

which is unhelpful because modprobe nouveau and modinfo nouveau indicate that the module nouveau is already loaded.

/etc/bumblebee/bumblebee.conf:

[bumblebeed]
VirtualDisplay=:8
KeepUnusedXServer=false
ServerGroup=bumblebee
TurnCardOffAtExit=false
NoEcoModeOverride=false
Driver=nouveau
XorgConfDir=/etc/bumblebee/xorg.conf.d
XorgBinary=/usr/lib/xorg/Xorg

[optirun]
Bridge=auto
VGLTransport=proxy
PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus
AllowFallbackToIGC=false

[driver-nvidia]
KernelDriver=nvidia_340
PMMethod=auto
LibraryPath=/usr/lib/nvidia-340:/usr/lib32/nvidia-340
XorgModulePath=/usr/lib/nvidia-340/xorg,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

[driver-nouveau]
KernelDriver=nouveau
PMMethod=auto
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau

/etc/bumblebee/xorg.conf.nouveau:

Section "ServerLayout"
    Identifier  "Layout0"
    Option      "AutoAddDevices" "false"
    Option      "AutoAddGPU" "false"
EndSection
Section "Device"
    Identifier  "DiscreteNvidia"
    Driver      "nouveau"
    BusID "PCI:01:00:0"
EndSection

[Lekensteyn]

nouveau here refers to the Xorg driver (on Ubuntu this is the package xserver-xorg-video-nouveau) rather than the kernel module which is also named nouveau.

Note that nouveau is not recommended for use with Bumblebee, use PRIME instead. See #773

[krichter722]

I see. This issue is more about improving feedback so that users can understand it and so that it makes sense.