Give us some details.
What is the exact version NUMBER of your Lightroom Classic CC? We need the version NUMBER and not words like "Current".
When you notice the high CPU load, exactly what tasks is Lightroom performing?? Be specific.
How large is your monitor in pixels (width and height)? Do not tell me inches.
Thank you for your response!
> What is the exact version NUMBER of your Lightroom Classic CC? We need the version NUMBER and not words like "Current".
Sorry.. EVERY version, EVERY update of Lightroom Classic CC since 7.0.1. That's what I meant by 7+.
> When you notice the high CPU load, exactly what tasks is Lightroom performing?? Be specific.
No visible tasks. When only the first dialog window appear, where I choose the catalog, the thread is already there, eating CPU and never "calms down". I.e. it is not task dependent (and not about catalog too). CPU is Intel i5 4670K, working at 4.0 GHz.
> How large is your monitor in pixels (width and height)? Do not tell me inches.
1920x1080. Actually, it's two. The other is 1080x1920.
First, please clarify something: you said you have turned off all synchronizing, but I am asking if you actually checked to make sure it hasn't been accidentally turned on. Also turn off face recognition (again, you need to actually see that it is turned off, you can't simply say you never turned it on).
Turn off the Graphics acceleration. You don't need it. Go to Preferences, click on Performance tab, then uncheck "Use Graphics Processor"
If that doesn't help, please revert to Lightroom 7.2, which doesn't have as severe issue as 7.3.1 with crashes.
If that doesn't help, please experiment by turning off one monitor and see if that helps.
I do mostly abstract photography and face recognition is something I turn off right after installing Lr Anyway, I have double-checked: all is turned off.
I can't turn on Graphics acceleration in principle (it is not supported for Direct X 11).
Finally, I turned off second monitor, but nothing changed.
Here is a screenshot of the Process Explorer. Well, it doesn't show 100% CPU, as you can see, but it does make a difference, when editing. Interesting fact that this ig75cd64.dll library is OpenGL Driver (for Intel Graphics), according to description. Now, I will try simply to move this file, but I think the last time I did that, Lr crashed too often.
Did you try the suggestion to revert to Lightroom 7.2?
Sorry, why would I do that now? I had this issue in all previous versions of Lr 7, including 7.2..