Lightroom 6.1.1: Consumes 100% cpu

  • 2
  • Problem
  • Updated 3 years ago
  • Solved
  • (Edited)
Lightroom 6.1.1 is consuming 100% cpu on 2 of my 4 cores, while doing absolutely nothing. It's not processing in the background. It has finished opening a (admittedly large) catalogue a good while ago, so it can't possibly still be loading it.

What the heck is it doing?? I'm in grid view, and have opened a regular ol' folder with 339 jpegs in it. No edits on those pictures. All pictures that are currently in view, have got thumbnails, so it's not building those either. Meanwhile, Lightroom is generally VERY slow, presumably because it's doing "something".

So again, looking at the application, it shouldn't be doing anything, yet it's consuming half my quadcore cpu. I'm afraid to run this on my laptop, on to go, because this kind of thing will eat my battery alive.

What is it doing, and how do I stop it doing that?

Adobe: please look into this and provide a fix - either by having it not consume that much horsepower, or by making it visual what the heck is going on in the background.

- Workaround (NOT A FIX) -
1) Build standard thumbnails for the folder in question
2) Go to a folder (real or virtual) with 0 pictures in it, so LR actually works again
3) Go back to the previous folder - Building thumbs doesn't even have to be finished! (srsly, this is weird, I know)
There we are. LR is now performing normally again, consuming 0% when idle.
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martijn Saly

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  • confused

Posted 3 years ago

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Simon Chen, Principal Computer Scientist

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Official Response
Lightroom CC 2015.3/6.3 is available today that fixed this bug.

Details here: