How do I fix resolution and brightness control on my Tensorbook?

In a terminal, run the command sudo prime-select on-demand. Then, reboot your Tensorbook.

As the Tensorbook is booting, repeatedly press either the Del key or F1 key to enter the BIOS.

In the BIOS, choose Chipset > GPU MODE > NVIDIA® Optimus™.

Choose Save & Exit > Save Changes and Reset.