Migration 21.04 to 21.10 PI 4

Budgie extras and budgie themes click : display budgie welcome
The screen Budgie welcome is blank
System freezes completely by running any video.
How to re-install Ubuntu Budgie 21.10 or how to come back to 21.04

Hi, yep known issue that was covered in the 21.10 release notes.

Basically Canonical know about the issue. The current workaround using fkms isn’t great.

Bug report to follow is in the Release notes

https://sourceforge.net/projects/budgie-remix/files/budgie-raspi-21.10/

I should note, in the bug report there is a candidate kernel that fixes things for some people. It is worth feeding back on the report on the results you find.