the /gamma 200(etc 1-300) not working ubuntu linux

[mikebefore]

can not make screen. brighter. is there a fix? same computer windows partition version /gamma command works.

[flowtron]

Do you get any error on the console when trying to use gamma? What does the initial log-output say about your installed drivers, what's the performance like?
If gamma fails it should output the SDL-error, that might help in fixing the problem - I suspect, most likely, you're running with mesa not proper OpenGL drivers!!

[OpenSource]

Its the same for me.
/gamma dosent do anything.
Did test via menu also and used "Apply now".
The only thing happening then was my resolution going from 1024*768 to 1024*698

[SELECT ALL] Code:

current locale: en_US.UTF-8
init: sdl
init: net
init: world
init: video: sdl
init: video: mode
init: video: misc
init: gl
Renderer: ATI Radeon HD 2400 (ATI Technologies Inc.)
Driver: 3.2.9756 Compatibility Profile Context
init: console
init: sound
Audio devices: PulseAudio Software, ALSA Software
Sound: PulseAudio Software / OpenAL Soft (OpenAL Community)
Driver: 1.1 ALSOFT 1.12.854
init: cfg
init: models
init: docs
init: localconnect

[tempest]

Same here, with an NVidia card. Use the driver's configuration interface, that does the job for me at least.

[castiel]

I had the same issue with my old graphics card(ATI). I have an NVidia now and it runs perfectly. I'm fairly sure it's just drivers issues, nothing to do with AC.