[argyllcms] Re: Calibrating N-Vidia Dual Display

  • From: "Hal V. Engel" <hvengel@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 10 Dec 2009 11:09:29 -0800

On Thursday 10 December 2009 08:02:46 am Graeme Gill wrote:
> Kyle Brandt wrote:
> > I am wondering are there any workarounds for calibrating both monitors? 
> > For instance, can I disable one of the monitors, restart X, calibrate
> > that one, and then disable that one, restart X, and then calibrate the
> > other one. Then, enable both, and they will both be calibrated, or does
> > it not work like that?
> Hi,
>       no it doesn't work that way, because access is needed to
> the VideoLUTs to install the calibration curves every time
> the system starts.
> The best you can do is calibrate and profile your primary display,
> and just profile your secondary display. If you are running
> color aware applications then the color should be managed
> correctly on your secondary display, although you will be unable
> to change things like it's white point, brightness etc. using
> calibration on that display.
> Graeme Gill.

The other option is to ditch TwinView and revert to xinerama.  This is what I 
do and I can calibrate both monitors without any issues.  As far as I can tell 
the only things you lose is the ability to change screen resolution at run 
time and the ability to rotate screens.  OpenGL works fine on both of my 


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