Brightness/Gamma issue

[tempest]

I say driver bug. If the gamma doesn't get restored to the original value when the setting process quits, that's most likely the driver's fault. Anyway, you should have some driver controls (Driver control settings/Catalyst control center/whatever) which offer you a gamma option. Reset that to 1.0/normal/..., or if that doesn't work, look around for something like "reset hardware defaults".