Ubuntu 15.04, bumlebee and nvidia GT540M, bugs?

Question

linux

Hello!
I have a system:
Ubuntu 15.04
nVidia gt540m
Problem with bumlebeed.
I installed the utility written above from the official stable repository, when I run programs with the optirun attribute, I get the following error

[ 4971.223037] [ERROR]Cannot access secondary GPU - error: Could not load GPU driver

[ 4971.223155] [ERROR]Aborting because fallback start is disabled.

Contents of the /etc/bumblebee/bumblebee.conf file

[bumblebeed]
VirtualDisplay=:8
KeepUnusedXServer=false
ServerGroup=bumblebee
TurnCardOffAtExit=false
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
AllowFallbackToIGC=false
[driver-nvidia]
KernelDriver=nvidia
PMMethod=auto
LibraryPath=/usr/lib/nvidia-current:/usr/lib32/ nvidia-current
XorgModulePath=/usr/lib/nvidia-current/xorg,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
[driver-nouveau]
KernelDriver=nouveau
PMMethod=auto
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau

bumblebeed -vv command output

[ 5195.660153] [DEBUG]Found card: 01:00.0 (discrete)
[ 5195.660185] [DEBUG]Found card: 00:02.0 (integrated)
[ 5195.660196] [DEBUG]Reading file: /etc/bumblebee/bumblebee.conf
[ 5195.660378] [INFO]Configured driver: nvidia
[ 5195.660397] [DEBUG]Skipping auto-detection, using configured driver 'nvidia'
[ 5195.660491] [DEBUG]Process /sbin/modprobe started, PID 28662.
[5195.660546] [DEBUG]Hiding stderr for execution of /sbin/modprobe
[ 5195.661686] [DEBUG]SIGCHILD received, but wait failed with No child processes
[ 5195.661866] [DEBUG]succesfully loaded bbswitch [ 5195.661911] [DEBUG] bumblebeed config file: /etc/bumblebee/bumblebee.conf [ 5195.661921 ] [DEBUG] X display: :8
[ 5195.661880] [INFO]Switching method 'bbswitch' is available and will be used.
[ 5195.661902] [DEBUG] Active configuration:
[ 5195.661930] [DEBUG] LD_LIBRARY_PATH: /usr/lib/nvidia-current:/usr/lib32/nvidia-current
[ 5195.661940] [DEBUG] Socket path: /var/run/bumblebee.socket
[ 5195.661949] [DEBUG] pidfile: /var/run/bumblebeed.pid
[5195.661959] [DEBUG] xorg.conf file: /etc/bumblebee/xorg.conf.nvidia
[5195.661968] [DEBUG] xorg.conf.d dir: /etc/bumblebee/xorg.conf .d
[ 5195.661977] [DEBUG] ModulePath: /usr/lib/nvidia-current/xorg, /usr/lib/xorg/modules
[ 5195.661987] [DEBUG] GID name: bumblebee
[ 5195.661996] [DEBUG] Power method: auto
[ 5195.662005] [DEBUG] Stop X on exit: 1
[ 5195.662014] [DEBUG] Driver: nvidia
[ 5195.662023] [DEBUG] Driver module: nvidia
[ 5195.662032] [DEBUG] Card shutdown state: 1
[ 5195.662134] [DEBUG]Process /sbin/modprobe started, PID 28663.
[ 5185.66211 DEBUG]Hiding stderr for execution of /sbin/modprobe
[ 5195.663207] [DEBUG]SIGCHILD received, but wait failed with No child processes
[ 5195.663228] [DEBUG]Configuration test passed.
[ 5195.663254] [ERROR] Cannot open or write pidfile /var/run/bumblebeed.pid.

The output of lspci -k | grep VGA -A2

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
Subsystem: ASUSTeK Computer Inc. Device 1642
Kernel driver in use: i915
--
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M] (rev a1)

Contents of the /etc/bumblebee/xorg.conf.nvidia file

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

Exhaust dpkg -l | grep nvidia

ii bumblebee-nvidia 3.2.1-93~vividppa1 amd64 NVIDIA Optimus support using the proprietary NVIDIA driver
ii nvidia-304 304.128-0ubuntu0.1 amd64 NVIDIA legacy binary driver - version
304.128 nvidia-current
ii nvidia-opencl-icd-304 304.128-0ubuntu0.1 amd64 NVIDIA OpenCL ICD
ii nvidia-settings 346.59-0ubuntu1 amd64 Tool for configuring the NVIDIA graphics driver

Help whoever can, already really tired of fighting this bumblebee, does not want to start. Before that, there was an nVidia prime, it worked properly.
Bumblebee used on 14.04 / 14.10, there were no problems

Answer 1

I have 15.10, and depending on the installed version of the proprietary driver, I constantly have to change this section:

[driver-nvidia]
KernelDriver=nvidia_355
PMMethod=auto
LibraryPath=/usr/lib/nvidia-355:/usr/lib32/nvidia-355
XorgModulePath=/usr/lib/nvidia-355/xorg,/usr/lib/xorg/ modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

So you double-check if you have the directories specified in the config and whether they contain what they should - you may have to correct the paths similarly to mine + the driver name includes the version.