[argyllcms] Re: Help: We don't have access to the RAMDAC

  • From: Serge Gavrilov <serge@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 22 Jan 2007 22:34:28 +0300

Thank you very much! I did not realized that it is not a good choice to
calibrate the monitor using 16bpp mode.

On Sun, Jan 21, 2007 at 12:32:24AM +1100, Graeme Gill wrote:
> Serge Gavrilov wrote:
> >My Video Card is Matrox MGA450, dualhead.
> >
> >I try to use Agryll CMS to load ICC profile. First I tried 
> >
> >dispwin -r
> >
> >The result is 
> >We don't have access to the RAMDAC
> >
> >I would greatly appreciate any help with this.
> >
> >This is ltrace output (perhaps this could be useful):
> The other thing to do is turn DEBUG on in dispwin.c and recompile.
> Judging from the trace though, one explanation is that the number of 
> entries in
> the RAMDAC doesn't match the screen depth. Perhaps you haven't set your
> display to a 24 bit depth visual ? There's really no point in trying
> to calibrate a display unless it is at least running 24 bit, and I've
> no idea how a less than 8 bit per component frame buffer is wired to
> a 256 entry RAMDAC.
> Graeme Gill.


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