Computer Model - Asus Zenbook Pro Duo UX581GV_UX581G
Ubuntu - 19.10 x86_64
Kernal - 5.3.0-26-generic
Desktop - Gnome 3.34.1
GPU - Nvidia GeForce RTX 2060 Mobile
Also have the intel UHD Graphics drivers but not using

Problem: Cannot alter screen brightness. If I unlock the function key, the F4 / F5 keys pop a slider on the screen to ramp brightness up and down but nothing happens (in terms of screen brightness). Additionally, going into settings, Power allows me to move the slider bar for screen brightness...but again, nothing happens to the brightness of the screen.

I'm happy to run any terminal command to provide additional data, just let me know. Appreciate any help in advance.