Message
Re: [colorvision_group] Dual Display Win XP
2007-04-14 by CDTobie@aol.com
In a message dated 4/14/07 1:30:19 PM, delk1945@... writes:
When I calibrate the Dell with Spyder2PRO, there is visible change in
the screen appearance. If I move from 6500 K to 5800 K, the screen
appears warmer. When I check the effect of calibration at the end of
the process, there is visible change. Neither of these are true with
the HP.
This would indicate that your videocard does not hold discreet sets of video corrections (VLUTs) for both monitor outputs. Its not uncommon under Windows for this to happen, or for the dual-head videocard to fail to be seen as two devices by Windows, which will cause you to be unable to assign distinct profiles. Either case will mean a failure to obtain full and distinct color management on both monitors. Two possible solutions: add a low cost second videocard, and run the second monitor from that. Or, add a PCI Express videocard, those appear to work in virtually all cases for dual monitor calibration.
In several trials I have, perhaps by chance and by choosing
different starting points, gotten desktop colors that are similar
(not perfect, but close). However, upon rebooting this similarity
goes away.
That would be the VLUTs getting loaded (or not getting loaded...) at that point.
When I open Photoshop and open a photo in display 2 and
move it to display 1, colors change visibly.
That could be from incorrect VLUTs on one of the displays, or an incorrect profile on one display, or both; no way to tell from that description.
While I intend to use the HP for photo editing, I would like for
there to be some rough consistency between the two. I don't believe
this should be impossible. I fear that I have overlooked something
obvious, but can't put my finger on it. Any help out there?
I assume I have described your "something obvious" above, though few people greet the news that they need to purchase another card, and find room for it, with pleasure...
Another possibility is that upgrading to Vista MIGHT fix the issue, but the likelihood of Vista not supporting your current videocard at all, or not supporting it for advanced usage, is perhaps more likely that it being a fix. And there is always the possibility of other incompatibilities or unavailable/reduced function drivers in the bargain.
C. David Tobie
Product Technology Manager
ColorVision Business Division
DataColor Inc.
CDTobie@...
www.colorvision.com
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