First of all, I am not sure if I will help you with this, but I am currently unable to comment on your question.
I am assuming that you have followed this sequence:
sudo apt-get install linux-headers-generic
sudo apt-get install bumblebee primus primus-libs-ia32
than nvidia driver:
sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get install nvidia-xxx
or
sudo apt-get install bumblebee-nvidia
in the end, reinstall bbswitch-dkms:
sudo apt-get install --reinstall bbswitch-dkms
Edit configuration files, reboot.
If not:
sudo apt-get remove --purge nvidia-xxx
sudo apt-get remove --purge bumblebee
If you have bumblebee-nvidia, replace it in code. Now reinstall everything starting from the top.
I can report that nvidia-346 won't work, you will just get a black screen after reboot, and will have to purge nvidia and x-server and reinstall x-server to get system back to normal.
I think that there is no way of safely installing nvidia driver conventionally (from nvidia-XXX.run) on Optimus systems, I have tried that few times and failed.
How exactly did you edit bumblebee, bumblebee.conf, xorg.conf.nvidia?
I've been getting that error when I happened not to have right driver name specified in bumblebee.conf.
I will give you my bumblebee.conf under the text. Have in mind that I am using default driver (bumblebee-nvidia). We are using the same OS.
However, I think the problem will latter arise in BusID line in xorg.conf.nvidia.
As you can see, BusID of your nvidia card is 03:00.0, and yet, default BusID in nvidia.conf file is 01:00:0. Currently, line is like this:
# BusID "PCI:01:00:0"
You need to remove hashtag and change the value, so that it would be like this:
BusID "PCI:03:00:0"
Try out my bumblebee.conf, edit BusID in xorg.nvidia.conf, and see what happens. I hope this will be of any help.
Waiting for respond.
# Configuration file for Bumblebee. Values should **not** be put between quotes
## Server options. Any change made in this section will need a server restart
# to take effect.
[bumblebeed]
# The secondary Xorg server DISPLAY number
VirtualDisplay=:8
# Should the unused Xorg server be kept running? Set this to true if waiting
# for X to be ready is too long and don't need power management at all.
KeepUnusedXServer=false
# The name of the Bumbleblee server group name (GID name)
ServerGroup=bumblebee
# Card power state at exit. Set to false if the card shoud be ON when Bumblebee
# server exits.
TurnCardOffAtExit=false
# The default behavior of '-f' option on optirun. If set to "true", '-f' will
# be ignored.
NoEcoModeOverride=false
# The Driver used by Bumblebee server. If this value is not set (or empty),
# auto-detection is performed. The available drivers are nvidia and nouveau
# (See also the driver-specific sections below)
Driver=nvidia
# Directory with a dummy config file to pass as a -configdir to secondary X
XorgConfDir=/etc/bumblebee/xorg.conf.d
## Client options. Will take effect on the next optirun executed.
[optirun]
# Acceleration/ rendering bridge, possible values are auto, virtualgl and
# primus.
Bridge=virtualgl
# The method used for VirtualGL to transport frames between X servers.
# Possible values are proxy, jpeg, rgb, xv and yuv.
VGLTransport=proxy
# List of paths which are searched for the primus libGL.so.1 when using
# the primus bridge
PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus
# Should the program run under optirun even if Bumblebee server or nvidia card
# is not available?
AllowFallbackToIGC=false
# Driver-specific settings are grouped under [driver-NAME]. The sections are
# parsed if the Driver setting in [bumblebeed] is set to NAME (or if auto-
# detection resolves to NAME).
# PMMethod: method to use for saving power by disabling the nvidia card, valid
# values are: auto - automatically detect which PM method to use
# bbswitch - new in BB 3, recommended if available
# switcheroo - vga_switcheroo method, use at your own risk
# none - disable PM completely
# https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods
## Section with nvidia driver specific options, only parsed if Driver=nvidia
[driver-nvidia]
# Module name to load, defaults to Driver if empty or unset
KernelDriver=nvidia-current
PMMethod=bbswitch
# colon-separated path to the nvidia libraries
LibraryPath=/usr/lib/nvidia-current:/usr/lib32/nvidia-current
# comma-separated path of the directory containing nvidia_drv.so and the
# default Xorg modules path
XorgModulePath=/usr/lib/nvidia-current/xorg,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
## Section with nouveau driver specific options, only parsed if Driver=nouveau
[driver-nouveau]
KernelDriver=nouveau
PMMethod=bbswitch
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau
