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Old 01-10-2005, 08:58 AM   #1
Registered: Jan 2005
Location: Norfolk, VA
Posts: 32

Rep: Reputation: 15
Monitor calibration (color temperature)

I need some way to adjust the color temperature of my monitor in Linux. In Windows, the Adobe Gamma Loader allows me to do it as does the driver for my vidcard(via the Display control panel applet). Unfortunately, I can find no similar tool for Linux. I've set the gamma using KGamma, but it does not allow you to change the color temperature which is what I need - my white point is shifted blue, causing grays to look blue. I've adjusted the gamma, but I can't get the lighter grays to not be blue without making darker grays too yellow. Since this is a laptop, there are no controls on the monitor itself, it needs to be done with software.

I looked into XCMS, but I can't figure out how the hell to use it (created a *.dcc file, but can't figure out how get the system to load it at startup). I've never seen such sorry documentation for a program before - you'd think someone could have bothered to have written more than just a half-assed man page for xcmsdb!!! (can you tell I'm getting frustrated?!?! )

Any help would be greatly appreciated.
Old 02-20-2006, 05:26 AM   #2
Registered: Aug 2005
Location: Estonia
Distribution: Ubuntu, Mandriva
Posts: 30

Rep: Reputation: 15
Well, I have exactly the same problem, so lets update the topic. I have a laptop with intel 915gm chip and how can I modify monitor color temperature? All monitor calibration tutorials I have found require to set the color temperature before modifing gamma. I have four programs for gamma, but nothing for color temperature! I do not believe that it is not possible to control my monitors color temperature!

So please, any hint to a better forum or mailing list could be useful as well!
Old 02-20-2006, 05:37 AM   #3
Senior Member
Registered: Nov 2003
Location: London, England
Distribution: Ubuntu
Posts: 1,460

Rep: Reputation: 47 and the site it links to are well worth a read if you want to set up your monitor properly.
Old 02-20-2006, 06:08 AM   #4
Registered: Aug 2005
Location: Estonia
Distribution: Ubuntu, Mandriva
Posts: 30

Rep: Reputation: 15
I totally agree with you, it is a good site and that is what I started with! My problem is that I can not set my monitors (laptop) color temperature, which is a required first step in monitor calibration. Cannot do first step, next ones will give no good result.

Old 02-20-2006, 07:22 AM   #5
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Registered: Dec 2005
Location: Massachusetts, USA
Distribution: Ubuntu 10.04 and CentOS 5.5
Posts: 3,873

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I'll tell you what I did. This is going to sound crazy but it works really well. I opened a web page and connected to an obscure web site named Then I entered the following string in the search criteria.


When I clicked on the "Search " button it displayed lots of pages with information about this subject. Amazing. One of the pages mentioned a Linux utility called Monica.

There were lots of other web sites listed by this obscure search engine. I think I'll use often. I predict that one day this little known site will become very popular.
Old 02-20-2006, 09:00 AM   #6
Registered: Aug 2005
Location: Estonia
Distribution: Ubuntu, Mandriva
Posts: 30

Rep: Reputation: 15
Oh my ...
Please, stress_junkie, please be so kind and tell me how to change monitors COLOR TEMPERATURE with monica or its successor GAMMApage? Or with xgamma? They are all about changing the gamma, not the color temperature. So please, if You do not understand the difference between gamma and color temperature, why do you have to post and think that I haven't spent some ours looking for the info?
Now, I'll copy here the help from monica and my problem is the first step, which is not possible with my laptops monitor.

1.) If possible, with the monitor controls, set the white point to 6,500K.
2.) Again on the monitor, increase your contrast to 100%
3.) And lastly on your monitor, raise the brightness until a
grey space is BARELY discernable in the black square.
4.) Using the grey 2.2 gamma image for reference, adjust
Monica's color sliders to create an even grey.
5.) If the grey has a color cast to it, then uncheck
"Synchronize Colors" and adjust colors individually.


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