Lightroom 12.3 No Preview when hovering over presets?

Thanks for everyone's input I appreciate it. All fixed. GPU issue (user error)

Not forgetting the option setting in Preferences > Performance:

Cannot remember if that is the default when preferences are reset.

Building on @TheDigitalDog's suggestions, another common cause of problems with hovering previews and applying presets is corrupted preferences.  Try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.

First, try disabling GPU in the preferences (Performance). Any better?


If not, recalibrate and build a new ICC display profile; the old one might be corrupted. If you are using software/hardware for this task, be sure the software is set to build a matrix, not LUT profile, Version 2, not Version 4 profile.


If turning OFF the GPU works, it's a GPU bug, and you need to contact the manufacturer or find out if there's an updated driver for it. This is why disabling GPU is an option as more and more functionality moves to the GPU in newer versions of many Adobe products. Disable third-party graphics accelerators. Third-party GPU overclocking utilities and haxies aren't supported.


Also see: https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html

If the GPU and display profile isn't causing the problem, see:

https://helpx.adobe.com/lightroom-classic/kb/lightroom-gives-error-preview-cache.html