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Kallithea
Kallithea
Known Participant
November 23, 2019
Question

Crop Tool Lag on Second Display with new 16-inch MacBook Pro

  • November 23, 2019
  • 5 replies
  • 1595 views

I've just set up a new laptop (a BTO 16-inch MacBook pro with maxed out RAM, GPU, and processor options), and I'm experiencing a very unusual lag while cropping images. I'm using an external monitor as my primary display and the laptop as the secondary one.

 

The lag is only on the secondary display. My usual approach to cropping an image is to do the cropping on the main display where the grid overlay is visible and then to glance over at the secondary display to see the results. It has always worked out that the changes made on the primary display are imediately visible on the secondary one as soon as I set a new crop. But now the secondary display is always one crop behind whatever I do. So the secondary display is always showing something different than the primary one, always the previous crop adjustment, not the crop as it currently stands.

 

And for what it's worth, I get the same performance when I reverse the displays and have the external monitor set to be the secondary one.

 

EDIT: I've just tried it with a much older Mac and am getting the same behavior on the secondary display.

    This topic has been closed for replies.

    5 replies

    Y
    yphoto123
    Participating Frequently
    May 25, 2020

    After spending time with level 1 support and not resolving the issue and no desire to reset my preference file YET AGAIN, I narrowed down the offending line in my preference file and I believe I now have it fixed.  At least until it breaks again. 🙂

     

    I just gave this information to a level 2 support rep.  If they can reproduce it, or if it is a known issue we may see a fix in an upcoming release.  This line item was one of many lines that were different in a "clean" preference file in comparison to my "bad" preference file.  

     

    I feel Adobe should have a tool to fix preference files instead of asking you to reset all of the time.

    1. You should backup your preference file Lightroom Classic CC 7 Preferences.agprefs
    2. Find this line AgDevelop_navigatorPanel_ExpansionState = 1,
    3. My bad preferences had a = 0, I changed this to 1 and now my crop tool is working

     

    I have had this setting as 1 for 7 days and it continues to work.  I only have one machine, so I can't verify it works in other places.  It may only fix my machine and there may be another issue for you, hopefully this fixes your LR install.

     

    MountainManJoe
    MountainManJoe
    Participating Frequently
    June 30, 2020

    same problem here. Lightroom Classic 9.3

    MacOS Catalina.

    Resetting preferences did not help.

    J
    johnc38530698
    Known Participant
    March 21, 2020

    I also have this problem. It started when I updated to 9.2 so I went back to 9.1. It worked for a while. Now it's occurring in 9.1. Very annoying!

    Win 10 Pro GTX 1080

    Kallithea
    KallitheaAuthor
    Known Participant
    November 24, 2019

    After resetting my preferences completely, the bug is now gone, and the crop tool behaves normally again.

    jeffsJBS
    jeffsJBS
    Participant
    December 3, 2019
    I'm a little confused. Could you be a little more specific? I have 8
    pages of preferences and it's not obvious which need to be reset.
    J
    Community Expert
    Jao vdLCommunity Expert
    Community Expert
    December 3, 2019

    All of them. Very easy to do: https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

    jeffsJBS
    jeffsJBS
    Participant
    November 24, 2019

    Similar with Windows 10.  Secondary display doesnt update until mouse release in primary display.  Never saw this before November update.  Previously secondary display updated in near real-time with very short lag.  Very annoying.  I consider this a bug. 

      J
      Community Expert
      Jao vdLCommunity Expert
      Community Expert
      November 23, 2019

      The secondary display in Develop mode is done from a jpeg preview and not the same way as the primary display. You will always see lag doing this that will take about as long as generating an almost full size preview image because the resolution of the screen is quite high. It can take many seconds to do that update. 

      Kallithea
      KallitheaAuthor
      Known Participant
      November 23, 2019

      I'm almost certain that it didn't always have this cropping lag, though. All other edits show up immediately, but not cropping edits. With the crop tool, I can wait for minutes and not see the secondary display update, but the second that I make a new crop, it instantly shows me the previous crop (not the current crop).

      J
      Community Expert
      Jao vdLCommunity Expert
      Community Expert
      November 23, 2019

      It should take 1 or 2 seconds each time normally. If it is longer there is a problem indeed

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