Hi @jock
Congratulations for your colossal work!. It's incredible to have linux on this tv boxes.
I have successfully installed your desktop image on my H96 Max Plus with RK3328. And it's working fine!
I've read in your first post about improve multimedia performance (videos, youtube, browser, desktop performance). With lima the window performance is slow. Do you have the same image for tv boxes with the legacy kernel and other stuff?
I think it could be interesting to test and check the differences.
Note: i've seen that when set on hold the kernel and dtb, it shows that are set on hold "edge" and "legacy". ones Maybe the native kernel and dtb are included on your image but disabled?
Thanks!