Problems soft proofing on external monitor, unless moving image window back and forth

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Problems soft proofing on external monitor!

I have encountered what I believe can only be a bug in Photoshop CC 2014:

My setup i a MacBook Pro retina, with an external Dell u2711 connected through display port. The monitors are calibrated with a custom profile, but the same behavior is present when using the default profiles for both internal and external monitor.

The problem is that sooft proofing on the external monitor gives very inaccurate results – unless I have first moved the image to the macbook internal display, activated and deactivated the sooft proof there, and then moved the image back to the external displays, after which it works as expected.

It is af Photoshop is unaware of it beeing displayed on a second monitor when activating sooft proof, but that the act of moving the image window back and forth causes photoshop to re-read the profile information and then display it correctly (which of course shouldn't be necessary.

There is a thread with someone experiencing a similar problem, but no solution
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Richard Rönnbäck

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Posted 3 years ago

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Chris Cox

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That sounds like an OpenGL or ColorSync issue that we've had trouble reproducing.
Yes, moving the window between displays forces an update of the profile associated with the window, and Photoshop then updates it's color conversion tables to match. The problem seems to happen when the OS assigns the wrong profile, but we can't get it to happen very often on our systems.

What OS version are you using?
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Richard Rönnbäck

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Chris, thanks for your reply.

It seems to happen 100% of the time for me.

* OS X 10.10.3 Swedish language.
* Photoshop 15.2.2 Swedish language.
* MacBook Pro (Retina, 15-inch, Early 2013)
* Two built-in graphics cards: Intel HD Graphics 4000 and NVIDIA GeForce GT 650M (it seems though, they only the latter is beeing used in my setup)
* Dell u2711 monitor, running at it's native resolution 2560x1440