Disable discreet VGA card in linux mint
Nvidia:
sudo rmmod nvidia
sudo tee /proc/acpi/bbswitch <<<OFF
check the output of dmesg if the ff shows
bbswitch: device 0000:01:00.0 is in use by driver 'nvidia', refusing OFF
if it does contain the above message, find which application using it and kill it. Then try turning it off again.
sudo lsof -n -w -t /dev/nvidia*
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