On Thu, 13 Sep 2001, hadron wrote:
> But I was playing around with the xgamma program today, and noticed
> that it only changed the gamma on the screen 0 device (as defined
> by the XF86Config device section), i.e. only on the first head. It's
> not a major problem, and the only reason for using it was that I
> had forgotten about the PNG gAMA bug in Photoshop 5.0. Anyway, I put
> the xgamma back to 1.0 and fixed the background image with pngcrush;
> still this could be a problem for those that need to adjust their
> gamma (and chromaticity) for more important reasons than just a
> desktop image.
The gamma can be changed separately. This is necessary because
different monitors may need a different correction. While there
is only one logical screen, xgamma's screen argument will reflect
physical screens in a Xinerama configuration. Eg.
xgamma -s 0 -g 2.0
xgamma -s 1 -g 2.0
Many other XFree86-specific extension like vidmode and DGA also
reference physical screens rather than logical ones.
Mark.
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