Driver Not Loaded, Ubuntu 20.04.3, rtx 3070

nvidia-bug-report.log.gz (162.9 KB)

I have installed Ubuntu 20.04.3 (64-bit) minimal installation, disabled secure boot and installed the recommanded driver ( ubuntu-drivers devices >> driver : nvidia-driver-510 - distro non-free recommended) on a HP-ZBook-Studio-15-6-Inch-G8-Mobile-Workstation.

$ dkms status shows:
nvidia, 510.47.03, 5.13.0-28-generic, x86_64: installed

$ nvidia-settings shows:

ERROR: NVIDIA driver is not loaded
ERROR: Unable to load info from any available system
(nvidia-settings:45178): GLib-GObject-CRITICAL **: 23:48:52.170: g_object_unref: assertion ‘G_IS_OBJECT (object)’ failed
** Message: 23:48:52.172: PRIME: Requires offloading
** Message: 23:48:52.172: PRIME: is it supported? yes
** Message: 23:48:52.192: PRIME: Usage: /usr/bin/prime-select nvidia|intel|on-demand|query
** Message: 23:48:52.192: PRIME: on-demand mode: “1”
** Message: 23:48:52.192: PRIME: is “on-demand” mode supported? yes

$ nvidia-smi
NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

$ prime-select query shows nvidia but Settings > About > Graphics shows: "Mesa Intel @ UHD Graphics (TGL GT1).

Thank you in advance for any help.