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gregde
Participating Frequently
November 8, 2023
Question

new M3 Max - display randomly dims and brightens in Develop module

  • November 8, 2023
  • 3 replies
  • 3594 views

I got my new 14" MacBook Pro with M3 Max and I'm immediately seeing the following behavior on both Classic and Cloud-based LR. When I go into the Develop module, the entire UI randomly dims and brightens as my move my mouse around. Disabling GPU acceleration fixes the problem.

 

LR Version: 13.0.1

OS: 14.1.1

 

Anyone else experiencing this?

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    3 replies

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    gregdeAuthor
    Participating Frequently
    November 9, 2023

    Looks like this is the same issue described here: https://community.adobe.com/t5/lightroom-classic-discussions/m2-max-lrc-external-monitor-develop-module-flicker/m-p/14221936/page/2

     

    The workaround described there - make sure brightness of the Pro Display XDR is "two clicks" below full - also works for me. 

    It's still definitely a bug in LR but at least I can use my laptop. 

      L
      lky99y
      Participating Frequently
      February 27, 2024

      Glad I found this.  The camera raw window in photoshop dims as well.  Just got a new M3 Max laptop and the adobe windows are dimming on me with my XDR monitor when my 5 year old machine would not.  I found if the brightness of the XDR was set about 1 cm from max brightness the adobe windows wouldn't dim.  Sidenote, why isn't there a more precise quanitifiable way to handle brightness for these expensive monitors??

      Ian Lyons
      Community Expert
      Ian LyonsCommunity Expert
      Community Expert
      February 27, 2024

      The issue described above also occurs in multiple non Adobe applications when external displays are connected to Apple Silcon  based Macs. BenQ (see link below) , Eizo and multiple others display vendors provide suggestions as to minimise the issue. To date, nobody, which includes Apple, has put forward a definitive fix. Lots of workarounds, but no actual fixes.

       

      https://www.benq.eu/en-uk/knowledge-center/knowledge/how-to-fix-mac-m1-m2-external-monitor-flicker.html

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      gregdeAuthor
      Participating Frequently
      November 8, 2023

      Following up to my own post - turns out this only happens when a Pro Display XDR is connected. Works fine on both the built-in laptop screen and a Studio Display.

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      gregdeAuthor
      Participating Frequently
      November 8, 2023

      Attaching LR sys info

      johnrellis
      johnrellis
      Legend
      November 8, 2023

      Just a guess: In Mac OS System Settings > Displays, try turning off Automatically Adjust Brightness and True Tone.  Maybe that feature is interacting badly with LR's use of the graphics processor.

       

      Also, verify you have Preset: Apple XDR Display (P3-1600 nits) selected.

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      gregdeAuthor
      Participating Frequently
      November 8, 2023

      Thanks for suggestions. Tried them both and made no difference. 

      Just to be clear - it's just the image (and background panel) that dims and brightens. The rest of the display (other LR panels, menu bar, other windows) stays the same. 

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