[lug] Adjusting color balance

[Kevin Fenzi]

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>>>>> "D" == D Stimits <stimits at comcast.net> writes:

D> Elyse M. Grasso wrote:
>> Is there a way to globally adjust the color balance of a monitor in
>> X windows, instead of having to adjust each individual image and/or
>> application? For some reason reds are weak on my laptop when it is
>> booted into Linux. This is annoying when viewing DVDs and images,
>> and doing color layouts.
>> 
>> It might just be a pallete selection problem , but I'm not sure how
>> to attack that either.
>> 
>> (I'm running KRUD 9 and KDE).
>> 
>> Windows seems less unbalanced, on the rare occasions when I boot
>> into it.
>> 
>> Are there good sample color wheels or other standard images I could
>> use when trying to diagnose and tweak things?


D> I think the answer will be dependent upon the particular video card
D> and drivers. I say this because I expect it to be an XF86Config
D> option that is implemented only if the driver authors decided to
D> add it. The option is "gamma". Gamma correction can come in several
D> flavors, one being just plain old gamma that is uniform across all
D> colors; optionally some driver implementors might make available a
D> separate gamma for each of the primary colors.

Yeah, but you don't have to bother with an XF86Config option for any
pretty recent version. Just use 'xgamma'. 

See 'man xgamma' for more details. 
You can set one overall value, or particular red/green/blue values. 
So, sounds like you want to increase the red... 

kevin
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