I have installed cuda toolkit following the installation guide. I choose deb installation. I have ubuntu 20.4 and nvidia Geforce 820m (drivers installed 340).
Before installing cuda, when I run nvidia-smi all things worked properly. Now after the installation I see these errors:
ERROR: NVIDIA driver is not loaded
ERROR: Unable to load info from any available system
(nvidia-settings:4467): GLib-GObject-CRITICAL **: 09:38:22.181: g_object_unref: assertion ‘G_IS_OBJECT (object)’ failed
** Message: 09:38:22.187: PRIME: Requires offloading
** Message: 09:38:22.187: PRIME: is it supported? yes
** Message: 09:38:22.323: PRIME: Usage: /usr/bin/prime-select nvidia|intel|on-demand|query
** Message: 09:38:22.323: PRIME: on-demand mode: “1”
** Message: 09:38:22.323: PRIME: is “on-demand” mode supported? yes
and when I try 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.
What i can do?