windows 10, but the overall feel is noticeable faster over the previous dot release.

I contacted Adobe Lightroom Technical Support and after a series of back and forths, they say that my NVidia GeForce GTX 780 GPU with 3 GB of VRAM doesn’t support graphic acceleration for editing despite the fact that their web site claims it should. They said the program automatically determines if the GPU can accommodate the advanced acceleration versus basic which only permits acceleration of previews.

Spent a lot of time searching for answers before I finally contacted Adobe. They and their supporters should update the information so you don’t think you’re doing something wrong.

Adobe said it was not something I could correct. It is hard wired into the code.

Allen

First launch requires some additional indexing time that subsequent launches do not. Application performance is slow during this time and users are sometimes too quick to pull the ‘doesn’t perform’ lever.

Rikk – what’s the purpose of the “Wait 5 minutes” ? The rest makes sense.

An update that actually wipes out GPU acceleration for many video cards (including mine) isn’t an update. It is a downdate… Zooming in and out now is choppy, editing is slower than in the previous version. Bad LR… bad boy LR… 🙁

You likely had a bad install and the reversion you did cleared the issue. I would recommend attempting a clean install of 8.4.

Clean Classic Install Procedure
Close Lightroom
Restart the computer
Use the Adobe Creative Cloud App to uninstall Lightroom Classic
Restart the computer
Install Lightroom Classic via the Creative Cloud App without launching any other programs.
Restart the computer
Launch Lightroom
Wait 5 minutes

I get the same thing: just a greyed out checkbox. This update doesn’t bring much.