<br><br><div class="gmail_quote">On Wed, Aug 17, 2011 at 9:59 AM, Rob Funk <span dir="ltr"><<a href="mailto:rfunk@funknet.net">rfunk@funknet.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5">On Wednesday, August 17, 2011 03:46:02 AM Rob Haag wrote:<br>
> Does anybody have any experience with color correction for a dual monitor<br>
> setup. I'm running Ubuntu 11.04 with Gnome 2.32 desktop (and compiz), I<br>
> have two brand new, identical displays and am having quite a color<br>
> difference. I'm also using an Nvidia card with proprietary drivers, and<br>
> both displays are connect via DVI. I have tried resetting both display's<br>
> settings to factory...several times. I have also tried swapping the cables<br>
> around, and the color remains per display (it is obvious, one has quite a<br>
> red hue on certain items and the other has a green).<br>
<br>
</div></div>My approach would be to ignore the software and video card (except for<br>
displaying test patterns), and concentrate on the monitors.<br>
<br>
Don't get hung up on the monitors being nominally identical. There are always<br>
manufacturing differences in components. Factory-reset won't get you anywhere<br>
except back to a reasonable starting point, not a final destination.<br>
<br>
Do the displays have a way to set the color temperature? Make sure they're<br>
both set to the same one if possible. If not, maybe there's a way you can<br>
fine-tune the colors of each monitor.<br>
<br>
After that you can use various calibration pattern images on the web to set<br>
the brightness and contrast individually.<br>
A couple relevant links for this:<br>
<a href="http://photographerusa.com/screencheck/" target="_blank">http://photographerusa.com/screencheck/</a><br>
<a href="http://www.normankoren.com/makingfineprints1A.html" target="_blank">http://www.normankoren.com/makingfineprints1A.html</a><br>
(scroll down to Gamma and black level chart)<br>
Or google for monitor calibration.<br>
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</blockquote></div><br><div>Your right, I guess the 'identical' monitor is most valuable to me for their same geometry...which is still great. After I posted last night, I played with the color settings, which gave me hope. Your suggestions will help much, thanks. I did google around for calibration techniques, but some of these guys are real color geeks. I just don't want an 'obvious' difference when spanning both displays. The test patter is a good suggestion too, I was spanning a window across and looking at elements like a 'bar' at the top, etc. I found Gnome Color Manager which will help manage color profiles (.icc)...but thats probably more than I need right now too. The issue I was having was trying to use software to adjust color, it would only do this with both units at once. So I think you are right for what I need, and that is to focus on the display itself with some test patterns. I think I will just match one to the other to make it easier. I'll post back if I discover anything interesting though. Thanks</div>