I have this problem... When Im on Ubuntu 16.04 (LTS) or basicly every Linux distro that i tried before, i have a bug. On open-source drivers, my brightness and gamma are normal, but when i use any nvidia driver (newer, older, doesnt matter), my gamma and brightness are way too dark. Im using a workaround with xgamma on startup, but its kinda not a permanent solution (because i use fullscreen apps and they reset the gamma upon exiting). So is there a way to set the same gamma that open-source driver has? Or do i have to use open-source driver until nvidia fixes it?
SnapOverflow
Have you tried 'Nvidia Settings'? It's in the repositories. Then you can set Gamma and Colors to your liking. even per app, or overall.