Oh, OK, thank you so much !! Hopefully there is a way out

Have a great day

Sorry, I don't understand your answer... do you mean I should do additional research ?

mblet,

I meant that I will research this for you by asking our Ubuntu engineers and reply back to you.

mblet,

You can click here for possible resolution or reach out here on the Ubuntu forums. 

mblet,

I am sure you have tried uninstalling both and reinstalled them back in the system.

mblet,

Have you tried enabling the switchable graphics to on?

Thanks but I already tried a few solutions suggested on the ubuntu forum (see here : https://ubuntuforums.org/showthread.php?t=2453253&p=13998194#post13998194) and apparently, people just don't know how to deal with my situation... and I already tried everything that's on the other link, to no avail.

It was initially on, I tried switching it off. It had the effect - apparently - to make my intel graphic card go away. But no improvement on the drivers side...

mblet,

Yes, I understand.  I looking at some articles in our knowledge base and not finding this one.  I will keep looking. 

I have tried something like 10 combinations, I'd say, with and without these two options, using ubuntu graphic installer or nvidia's shell installer... to be honest, I am a bit lost... I've never seen a problem like this before (I am a humble mere user of linux since 15 yrs, but a complete newbie under ubuntu, used Fedora before...).

mblet,

I contacted our Ubuntu team and they suggest the following information.

Try blacklisting Nouveau, although you say you tried running the shell installer from NVIDIA, which should do this automatically. You might try disabling “switchable graphics” in the BIOS as well.  (it looks like you tried this, but not with explicitly blacklisting Nouveau).

mblet,

Thats fine. Keep us updated.

Hi,

Thanks a lot for your message and for not giving up on me ;-). I am going to retry this, but as a matter of fact, I had already blacklisted Nouveau before, as I have this :

more /etc/modprobe.d/blacklist-nvidia-nouveau.conf
1 blacklist nouveau
2 blacklist vga16fb
3 blacklist rivafb
4 blacklist nvidiafb
5 blacklist rivatv
6 alias nouveau off
7 alias lbm-nouveau off
8 options nouveau modeset=0

mblet,

Following up to see if to if retrying with the Nvidia driver was resolved? Let us know.