I'm guessing the BenQ is a wide gamut model, and that's where you see the oversaturation, right? It sounds like Photoshop isn't using the right display profile - until something makes it. Using an "sRGB -type" display profile for a wide gamut display will cause oversaturation.
This is the first time I've heard about it in Photoshop - but it is actually not all that uncommon in ACR. What happens is that the profile for the main display is used even when the application is on the secondary display. A typical configuration is laptop + external desktop monitor.
Whether it's an Adobe bug or an OS bug is impossible to say. Maybe a combination. Try to switch display assignments in the OS (main <> secondary) and see if it still happens.
Oh - almost forgot: Don't change anything in Color Settings! That's not where the problem is. This is about the display profile, not the document profile.
I thought so too... It actually does look like Photoshop is using the
setting from my primary monitor (only software calibrated and not wide
gamut) and changes back to the correct setting at a certain point.
I am not on a Laptop/external Monitor setting. I am using a Desktop PC
with my 24" Acer "ordinary" Display as my primary monitor and my Benq
SW2700 as secondary.
I will to switch primary for secondary tomorrow and see whether this helps.
Thank you for your ideas!
Am 26.01.2018 um 19:28 schrieb D Fosse:
Image opens oversaturated and changes to regular all of a sudden
created by D Fosse <https://forums.adobe.com/people/D+Fosse> in
/Photoshop/ - View the full discussion