Have you turned off GPU acceleration to see if that helps? Lightroom Preferences->performance tab.
Also turn off «Face detection» in your catalog
Mac: -> Lightroom - Catalog Settings
Windows: -> Edit - Catalog Settings
on the Metadata Tab deselect automatic face detection
Daniel (from Switzerland)
Yes the GPU acceleration is on and face detection is off
Try turning GPU acceleration OFF to see if that helps. It's just a simple mouse click to give it a try. It has helped lots of users. I know, you have what you consider to be a good graphics card. But give it a try.
It semms to work correctly again.
I have an explanation.
Perhaps, LR had to recreate the thumbnail.
I try to work for one day and if it's OK I put solved
Thanks to all
If you turned off GPU acceleration, and now Lightroom is working properly, then there is no other explanation. GPU acceleration at this time is primarily for users who have high resolution (4K and 5K) monitors.
it's before I try to turn off the GPU acceleration
The dysfunctionment is not solved.
I try to switch OFF or ON GPU acceleration but no change.
Lightroom is not usable like that !
The use for Lightroom / Global of différents parts of the computer is :
CPU 22-23% / 26%
Physical memory : 8G (on 32)
GPU global : 3%