I've had a strange thing happen with the most recent version of Photoshop the last few days.
As soon as I click on the icon to start PS, the entire monitor screen brightens significantly. It also shifts significantly to the blue, cooling the photos. Once I exit PS, my monitor brightness returns to zero.
I should stress, this increase in the brightness and cooling affects all problems, not just PS, for as long as PS remains running.
I use a calibrated monitor. This strange PS behavior means I can't edit while PS is running. The results are too bright and too blue.
I'm running Windows 10 with 16GB of RAM and an SSD as primary drive and mechanical hard drive as the secondary drive.
I use a calibrated monitor.
Calibrated how and with what calibrator?
Does this affect the entire interface, or is it limited to image/histogram/color picker? If the former, it's a bad video driver, if the latter, a bad monitor profile.
Do you have screenshots that could illustrate? (don't attach, insert image directly into the post).
It brightens the monitor for every app, as long as PS 2021 is running. Exit PS 2021 and everything returns to normal. It is clearly something that PS is triggering, since it does not happen with any other software.
I is clearly just brightening the monitor, not altering any pixel values.
The images appear identical (save cursor position etc.) so what are they intended to demonstrate?
I was asked to provide sample screen shots before and after entering Photoshop.
I realize they look similar. They are not identical, in the sense that they are two separate screen captures.
I find it curious that only Photoshop exhibits this behavior. Noting else in Adobe CC does this. No LR, Not LrC. Not InDesign. Etc.
It's very madenning, because Photoshop affects the monitor for every running app. Enter Photoshop and the monitor immediately brightens. For everything. Exit Photoshop. The monitor returns to normal.
I'm wondering if Greg Benz's Lumenzia 9 is the culprit. I let it optimize my Photoshop experience. I know, for B&W, it set the gamma for its own preferred setting.
That's what appear to be happening, like Photoshop is altering the gamma fpr my monitor and restoring it on exit.
I misspoke. The same thing happens with Illustrator and InDesign. Not with LR, LrC, and Acrobat.
Do you have multiple screens? Multiple GPUs?
What happens if you change the monitor profile (just for testing) to sRGB?
I have my ICC monitor profile set to use a D65 white point and illuminant of 160 cd/m3. Standard tone response curve. Gamma 2.2. I use i1Profiler from Xrite to calibrate my monitor.
From your description, it sounds like the calibration tables are thrown out from the video card. This is stored inside the profile for convenience, but is actually not part of the profile as such (which is a standard icc profile).
As for why this happens when Photoshop is open, that's a mystery and something I have never heard about before.
But there is still a pattern of some kind here. The recent 22.3 update seems to be problematic in several ways, and most of the reported problems seem associated with the GPU/video card/driver. So that could be a link.
In short: Try to revert to 22.2, and see if this particular problem goes away. If it does, it should be reported as a bona fide bug on the feedback site. To revert, open the CC desktop app, uninstall PS and reinstall.
When you reinstall, click the three dots to get "other versions", and pick 22.2. (I had to do that because of a different bug in 22.3).