Lightroom Classic: Develop Image does not match Library / Exported image when Use Graphics Processor is Enabled

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Lightroom Classic Develop Image does not match Library / Exported image when Use Graphics Processor is Enabled

Similar to this community post.  There is a bug, where the Develop Image is different in color / saturation / etc compared to the Library and Exported image.  The cause in my case seems to be since I calibrated my monitor and set a custom color profile, this profile is used in Library mode, but in Develop mode , when 'Use Graphics Processor' is enabled for performance, the image displayed is wrong, the colors are more saturated, darker, etc.  Disabling the graphics processor makes the Library and Develop module images match, but this reduces performance.  When the graphics processor is used, it should use the same color profile that it uses with the Library module.

https://community.adobe.com/t5/lightroom-classic/the-photo-looks-different-in-library-and-in-develop/m-p/11069197?page=1#M184132
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Jerrol Maxwell

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Posted 3 months ago

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Johan Elzenga, Champion

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Using GPU accelleration should have nothing to do with the monitor profile being used. That profile is always the same. GPU accelleration just means that the computing power of the GPU rather than the CPU is used for certain calculations. The link you gave refers to a situation where a specific DNG seems to be the problem, possibly due to incorrect EXIF data. I'm not sure if your problem is related to that at all.
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Rikk Flohr, Official Rep

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This sounds like a bad display profile.

As a test, if you change from your custom profile to sRGB and Library now matches Develop, then you likely need a new profile. 
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Jerrol Maxwell

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I ran the ColorSync Utility and Verify does not indicate an issue.   Under Devices it shows BenQ SW271 with HDMI HD and HDMI SD , HD shows the profile I am using. SD shows the default factory profile.  The switching the profiles with Hardware acceleration turned off, it the SD factory profile looks like the image that is presented in develop when the custom profile is enabled and hardware acceleration is turned on.
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Johan Elzenga, Champion

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I see you use a BenQ monitor. I understand there are issues with the BenQ monitor profiling software. I don't own a BenQ monitor myself so I cannot tell you exactly what those issues are, but I have seen this being mentioned in a few threads here. For example: https://feedback.photoshop.com/photoshop_family/topics/benq-sw271-acr-color-issue
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Rikk Flohr, Official Rep

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Again, As a test, if you change from your custom profile to sRGB and Library now matches Develop, then you likely need a new profile. 

Note this is the sRGB that ships with macOS not a BenQ profile. 
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Bill

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If I edit a photo and then return to the Library Module, it often takes 2-4 seconds for the image to match that in the Develop Module. A slower computer or GPU would extend this time. For a couple months I was using a laptop with a 4-core i7 CPU and no GPU and then the wait could be as long as ~10 seconds. But it always eventually matched. 
 
After exporting the question changes a bit. How is the image being viewed outside Lightroom? I'm on Windows and my outside viewer is Windows Photos. Photos adds saturation, sharpening and noise reduction so the images never match those when viewed in the Lightroom Library or Develop modules. Outside viewers are not going to use the Lightroom profiles. 
 
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Jerrol Maxwell

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It is not a delay and the machine is not slow. It is the other direction, Library view shows the correct image, going into develop mode the image is more saturated and darker than it should be when hardware acceleration is on.  When it is off, then the images are the same.

This issue looks to explain why I was having to print/edit over and over because the image was not matching the print like it should.

Mac Pro 3 GHz 8-Core Intel Xeon E5 / AMD FirePro D500 3 GB