I’ve installed Pop!OS after getting my Lenovo Ideapad Pro 5 back from the warranty repair. Supposedly they changed the motherboard (which I don’t doubt, it was waiting a week for new parts apparently), but even after that I’m still getting graphical errors and bugs when moving between desktops and other window animations. I know X11 can be a bit buggy at best, so it could just be that on top of the newer SoC.
I had the same issue (on Pop!_OS), and I fixed it by tweaking the boot options to change IOMMU settings for my GPU.
I would try testing without the splash option, as that will change when/how GPU drivers are loaded and it might fix the glitches issue (but might still cause other issues).
I’ll give that a go next time I check out Pop!OS :) Thanks!
At least for now, KDE-Neon is running pretty stable. I’ll give a few 3D apps a go and get back to this thread if its good.