Welcome to the Lightroom Community. I'll need more info to help you figure this out. Please go to Lightroom Classic > Help > System Info > Copy & paste here.
What type of images do you work with? JPEG or RAW? Does Lightroom Classic slow down at a certain tool or task? In the meantime, try this:
Go to Lightroom > Preferences > Performance > Use Graphics Processor > Set it to Off if it is on Custom or Auto. If this shows you any differences, please check this article to troubleshoot further: https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html
Looking forward to hearing back from you. Thanks! Sameer K
thank you very much for your support - YESm it helps. I switched OFF the graphicprozessor and speed is like before update.
But another question please....why one update changes all? Before this 12.1 Update all was running normal also WITH the graphicprozessor. Why changes ONE small Update these procedure??
Do I need a new graphic card to use it? or its is just a driver problem?
Adobe is making continual improvements to its use of the graphics processor, and it's very sensitive to bugs in the drivers (of which there are many, which is why manufacturers are continually releasing new drivers). Very likely 12.1 contained changes to how it uses the graphics processor, which tripped over bugs in your current driver.
If that doesn't help, please copy/paste here the entire contents of the LR menu command Help > System Info -- that will let us see exactly which versions of hardware and software LR thinks you're running.
I am having similar prolems, see my discussion from today, titled "LRC Version 12.1 performance issues using masks" I notice it mostly with masks and how long it takes for the adjustments to happen. I have updated my Graphics Driver as well but it does not help> I will try the suggestions made here as well. I hope we have better luck sorting out the problem.
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