Photoshop CC: Suspension of Monitor ICC Profile (System Mechanic 14.5 issue)

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A new symptom has shown up recently, I think it might have been after an update of Photoshop CC (2014.2.2 release). Starting Photoshop causes my monitor's Spyder 3 Express ICC profile to go away, then closing Photoshop allows it to return. Has anybody else seen this?
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GARY FISH

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Posted 4 years ago

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Chris Cox

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Your profile can't "go away", it's just data that the OS associates with your display, plus maybe a LUT for correction.

Also, Photoshop cannot change the display profiles or the correction LUT on the video card.

Most likely you have some utility software that is set to change something about the correction LUT or the display settings when certain applications are launched.

So, what exactly do you see happening?
And what utilities do you have installed that might cause it?
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GARY FISH

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When I start Photoshop, the screen brightens (as though the Spyder3express.icm profile is being suspended). When I close Photoshop, the screen goes back to normal.

This doesn't happen with Bridge or Lightroom or any other application. The only thing I can think that might cause this is the Nvidia driver, since it has game specific optimization settings, but there are no settings for non-game applications like Photoshop.

I've tried to trace what's happening with a Sysinternals Process Monitor script, and I can see Photoshop opening Spyder3express.icm, but I can't tell what it's doing with it.
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Chris Cox

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OK, so you have some utility outside of Photoshop doing that.
Photoshop itself cannot change the video card LUT, or the display profile.
Photoshop only reads the display profile to see how to reproduce color accurately on the display.

Yes, the video card driver might have a per-application setting, or the calibration software.
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GARY FISH

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I found the cause of my problem.

I recently installed iolo System Mechanic 14.5, and its LiveBoost PowerSense automatically invokes an "Ultra Performance - Graphics/3D/CAD Design" mode for several applications, including Photoshop. The System Mechanic help info states that "Power modes are a combination of Power Plan settings within Windows and disabling unnecessary processes/services to free up system resources." It doesn't state which processes and services are disabled, but apparently one of them is necessary for using my monitor calibration profile.

Anyway, I disabled the PowerSense automatic switching, and everything's back to normal.
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Chris Cox

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OK, I didn't know about that utility. Now we'll add it to the list of suspects.