[Openchrome-users] Gamma setting

[userforum@openchrome.org]

Gamma setting
Is it possible to set gamma? xgamma has no effect.
Trying xorg 6.8.2 with openchrome and xorg 7.0.
Two of my monitors haven't gamma calibration controls, and adjusting my main monitor I can reach minimal gamma 2.4-2.5 (setting maximum brightness only, what is not comfortable for eyes), but want 2.2 (sRGB, standard RGB) or even 1.8 (Mac standard).