LrC Second monitor blurry in Ver 10.2 Develop Module

New Here ,
Apr 16, 2021 Apr 16, 2021

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When in the Develop module my second monitor becomes blurry.  This happened at the time of 10.2 update. I am running iMacPro and MacOS Big Sur 11.2.3.  Interestingly, LR system info incorrectly shows I'm running MacOS 10.16.0.

 

iMacPro 

64GB Ram

Radeon Pro Vega 64 16GB

LG Ultra Fine Display 27in - Secondary Monitor

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Adobe Community Professional ,
Apr 17, 2021 Apr 17, 2021

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Please try to switch off the GPU support from the Lightroom preferences and check if that helps to fix the issue.

Go to Lightroom > Preferences > Performance tab > Uncheck "Use Graphics Processor" > Restart Lightroom.

https://helpx.adobe.com/lightroom-classic/kb/lightroom-gpu-faq.html#troubleshooting

https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html

 

Is your system up-to-date, especially the driver for the graphic card?

Please check if there is a new version of the driver.

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New Here ,
Apr 17, 2021 Apr 17, 2021

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It seems turning off acceleration has made second monitor useable again.  I am running latest version of MacOS which is supposed to include Radeon driver updates as well.  To reiterate, all was well until LrC 10.2 update.  

 

Also, should I be concerned that LrC System Info does not reflect I am running Big Sur?

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Most Valuable Participant ,
Apr 17, 2021 Apr 17, 2021

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Adobe has acknowledged this problem:

https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-classic-monitor-2-in-lightr...

 

Please add details of your issue to the bug report, and be sure to click Like and Follow at the bottom of the first post. That will make it a little more likely that Adobe will prioritize a fix, and you'll be notified when the bug's status changes.

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Most Valuable Participant ,
Apr 17, 2021 Apr 17, 2021

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"Also, should I be concerned that LrC System Info does not reflect I am running Big Sur?"

 

No.  Here's what LR and Mac OS report:

 

LR Help > System Info: Operating system: Mac OS 10; Version: 10.16.0 [20D91]

:red_apple: > About This Mac > System Report > System Version: macOS 11.2.3 (20D91)

 

LR may be getting the version from /System/Library/CoreServices/SystemVersion.plist, which shows 10.16 (20D91).  Google shows threads discussing this during the beta of Big Sur, but I didn't see any authoritative answer why SystemVersion.plist still shows an incorrect version.

 

 

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