Re: [Linux-fbdev-users] matroxfb: supports gamma on primary VGA out?

[Stephen K. <sr...@sr...>]

> These ioctls control only TV output - MATROXFB_S_*TVO*CTRL.  If you
> want VGA gamma correction, do it in software - Matrox G400/450/550 is
> 8bit only, so it is not very interesting to push this task to
> hardware if you are using 24/32bpp mode.

Thanks very much for clearing this up.

I guess doing the correction in software is easy enough with 3x 8-bit
look-up tables (if this is what you mean by '8bit only'?)  But of course
it's less than ideal to have to modify applications like this. Luckily
the apps I care about most (fbxine and mplayer) already support
software gamma correction, and the CPU overhead isn't too great, so no
need to install an X server just yet. :-)

Thanks again.
Stephen