Hi Mart!!!
Just checked the 4G Decoding (Above 4G…) in the BIOS menu, and it was already enabled.
Using the grep -r -E "nouveau|nvidiafb|nvidia" /etc/modprobe.d/ I got the following output:
/etc/modprobe.d/blacklist-nvidia-nouveau.conf:blacklist nouveau
/etc/modprobe.d/blacklist-nvidia-nouveau.conf:options nouveau modeset=0
/etc/modprobe.d/blacklist-framebuffer.conf:blacklist nvidiafb
I think it means that those are already blacklisted, right?
Thank you for the help and the patience!!