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Good time of day everyone!

I'm facing this problem with my Ubuntu 12.04.1 and a new ViewSonic monitor. The trouble is that the monitor has it's default gamma value set too high and there is no way I can adjust it by monitor hardware controls.

So far I've been using the xgamma -gamma .75 command to get a comfortable picture. The problem is that after the system is locked or after I go to the "Switch User" menu gamma is reset back to 1.0 level. What can I do to adjust it once and for all?

UPD: I tried to use lprof to create a new *.icm and to load it with gnome-color-manager, but I don't see any difference between the new and the default one. I don't even know if the profile had been applied correctly.

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