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I am on a clean minimal Debian Stretch install with just a couple of graphical packages installed. I instelled these:

sudo apt install xserver-xorg-core xinit bumblebee-nvidia primus primus-libs:i386 libgl1-nvidia-glx:i386

But I could swap propietary bumblebee-nvidia with open source bumblebee.

I also put my user to the bumblebee group:

sudo adduser $USER bumblebee

After reboot my Intel card works fine:

ziga@ziga-laptop:~$ glxinfo | grep OpenGL

OpenGL vendor string: Intel Open Source Technology Center

OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile 

OpenGL core profile version string: 3.3 (Core Profile) Mesa 13.0.6

OpenGL core profile shading language version string: 3.30

OpenGL core profile context flags: (none)

OpenGL core profile profile mask: core profile

OpenGL core profile extensions:

OpenGL version string: 3.0 Mesa 13.0.6

OpenGL shading language version string: 1.30

OpenGL context flags: (none)

OpenGL extensions:

OpenGL ES profile version string: OpenGL ES 3.0 Mesa 13.0.6

OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00

OpenGL ES profile extensions:

But my Nvidia card wich is Geforce 610M won't work when called with optirun:

ziga@ziga-laptop:~$ optirun glxinfo | grep OpenGL

primus: fatal: failed to load any of the libraries: /usr/lib/x86_64-linux-gnu/nvidia/libGL.so.1:/usr/lib/i386-linux-gnu/nvidia/libGL.so.1:/usr/lib/nvidia/libGL.so.1

/usr/lib/x86_64-linux-gnu/nvidia/libGL.so.1: cannot open shared object file: No such file or directory

/usr/lib/i386-linux-gnu/nvidia/libGL.so.1: wrong ELF class: ELFCLASS32

/usr/lib/nvidia/libGL.so.1: cannot open shared object file: No such file or directory

If I use apt to search for my card I get this:

ziga@ziga-laptop:~$ sudo apt search 610M

Sorting... Done

Full Text Search... Done

nvidia-legacy-304xx-driver/stable 304.137-5~deb9u1 amd64

  NVIDIA metapackage (304xx legacy version)



nvidia-legacy-304xx-kernel-dkms/stable 304.137-5~deb9u1 amd64

  NVIDIA binary kernel module DKMS source (304xx legacy version)



nvidia-legacy-304xx-kernel-source/stable 304.137-5~deb9u1 i386

  NVIDIA binary kernel module source (304xx legacy version)



xserver-xorg-video-nvidia-legacy-304xx/stable 304.137-5~deb9u1 amd64

  NVIDIA binary Xorg driver (304xx legacy version)

From this I would install nvidia-legacy-304xx-driver but I am afraid this won't work well with other packages that I have installed above. Is it possible that I also need xserver-xorg-video-nvidia-legacy-304xx?

Can anyone explain to me which packages to install and why?

Well, I couldn't wait any longer and I tried installing the xserver-xorg-video-nvidia-legacy-304xx. It really looks like this package is in conflict with bumblebee-nvidia package. I got this after installation:

nvidia-legacy-304xx:

Running module version sanity check.

 - Original module

   - No original module exists within this kernel

 - Installation

   - Installing to /lib/modules/4.9.0-8-amd64/updates/dkms/



depmod...



DKMS: install completed.

Setting up nvidia-legacy-304xx-driver (304.137-5~deb9u1) ...

Processing triggers for libc-bin (2.24-11+deb9u3) ...

Processing triggers for glx-alternative-nvidia (0.8.3~deb9u1) ...

Processing triggers for menu (2.1.47+b1) ...

Processing triggers for update-glx (0.8.3~deb9u1) ...

Processing triggers for glx-alternative-nvidia (0.8.3~deb9u1) ...

update-alternatives: warning: forcing reinstallation of alternative /usr/lib/nvidia/bumblebee because link group glx is broken

Processing triggers for libc-bin (2.24-11+deb9u3) ...

Processing triggers for initramfs-tools (0.130) ...

update-initramfs: Generating /boot/initrd.img-4.9.0-8-amd64

Processing triggers for bumblebee (3.2.1-14) ...

I uninstalled the xserver-xorg-video-nvidia-legacy-304xx and tried to install the nvidia-legacy-304xx-driver package which also installed the xserver-xorg-video-nvidia-legacy-304xx package. It returned no warnings and no errors, but after reboot optirun glxinfo | grep OpenGL command still fails...

It looks like there is no solution to this even on Debian which was supposed to be stable?

Like @Antonio Orizondo Leyva sugested I installed the packages he suggests and executed the command sudo update-alternatives --config glx and I got to choose different options for my GPU's:

There are 3 choices for the alternative glx (providing /usr/lib/glx).



  Selection    Path                       Priority   Status

------------------------------------------------------------

  0            /usr/lib/nvidia/bumblebee   125       auto mode

  1            /usr/lib/mesa-diverted      5         manual mode

  2            /usr/lib/nvidia             100       manual mode

* 3            /usr/lib/nvidia/bumblebee   125       manual mode



Press <enter> to keep the current choice[*], or type selection number: 

I tried selecting every single one of them and then rebooted, but the end result was the same... Except for the second option (nvidia) which after reboot said it can't find openGL.1.so or something... So it is impossible to even use the Nvidia card by itself!?

Any other Ideas?

I had some similar issues with a GTX 1050.

I think that you can bypass the nvidia-detect command, so this is what I did on Debian Buster 64 bits kernel 4.17:

1. 
   

   Execute

   
   
   

   apt install bumblebee-nvidia linux-headers-$(uname -r)
   
   

   
   
   

   This should install nvidia-driver, bbswitch-dkms and blacklist which were needed in /etc/modprobe.d. You need the headers of your running kernel for the addition of the new modules (bbswith and nvidia*, in my case nvidia-current).

   
   

I had no need to add the i386 arch and everything works fine, check the glx provider you are using with

update-alternatives --config glx

set it to any option except nvidia, reboot your display manager and test again.

After reading this Debian bug report I realized that I ought to install package libgl1-nvidia-glx. This fixed my problems, but I have to criticize Debian for this, because on their official Bumblebee webpage it is said to use this command to install:

sudo dpkg --add-architecture i386 && sudo apt-get update && sudo apt-get install bumblebee-nvidia primus primus-libs:i386 libgl1-nvidia-glx:i386

But this command is missing the crucial libgl1-nvidia-glx which needs to be installed together with its i386 cuonterpart in order for all aps to work!

So a quote to Debian:

While you are the best distribution on this planet and you seem to be the most stable, make sure to keep your official Wiki updated like Arch does! Only like this your users won't have negative experiances like I did and more will choose your distribution.