Allow gamma custom ranges in the Ubuntu driver to allow for night time color changes software to work (f.lux, Redshift, etc...)
Gamma color calibration seems to be unavailable for the Displaylink on Ubuntu.
Allowing it will enable night time screen color changing software to work and also allow manual customization with xrandr commands.
Mark L. commented
Yes! Would love this as I use my Ubuntu PC nearly only in the evening or night where the ability to control brightness and color temperature becomes very important.