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How can I calibrate X display colors and gamma?
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Axl13
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Joined: 01 Nov 2003
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Location: St. Petersberg, Russia

PostPosted: Tue Feb 03, 2004 5:09 pm    Post subject: How can I calibrate X display colors and gamma? Reply with quote

It there a standart tool for it, or should I make changes in XFree86 confiuration files?
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nephros
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PostPosted: Tue Feb 03, 2004 5:33 pm    Post subject: Re: How can I calibrate X display colors and gamma? Reply with quote

Axl13 wrote:
It there a standart tool for it, or should I make changes in XFree86 confiuration files?

Both. There is a command-line app called xgamma which comes with X and allows you to change gamma on-the-fly.
You can also specify the gamma for your monitor in XF86Config:
Code:
Section "Monitor"
    Identifier  "TV"
    VendorName  "Philips"
    ModelName   "CM8833"
    HorizSync   30-50
    VertRefresh 60
    Gamma               1.2         
EndSection

If you give three values, X interprets them as individual gamma values for red, green and blue.
There is also a tool called kgamma for KDE (emerge kgamma) which has a GUI wizard and will edit the XF86Config file automatically (*shudder*).

I recommend this page for a load of calibration images and tips: http://home.online.no/~ptrptr/back/monitor/monitor.htm

HTH.
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