Just an update... just found out that Ubuntu own version is marked HIGHER than PPA version, so now have to adjust the version name so we can override them. This was never an issue before they decided to build 3rd party drivers.
I have just installed ubuntu 22.04 on a pi4, and confirm that stars 3.5.9 stable installs perfectly from the ppa.
Good news! The performance of stars and ekos under Gnome in jammy seems noticeably more snappy than in 20.04. I haven't tried an actual imaging session yet, but this is really an improvement.
Confirmed....installing fine on 22.04 LTS (kubuntu) now. already had kstars and indi-bin working fine as I'm connecting to a rPi that hasn't been updated... yet... but just installed indi-full on my pc with no conflicts or dependency issues whatsoever. Now i can connect my additional equipment to my pc too. Thanks Jasem and anyone else who sorted this for us all.
If you had the Ubuntu official indi installed before, you should remove them ALL first.
Some packages without 'indi' prefix should be removed like:
sudo dpkg --remove libplayeronecamera2
sudo dpkg --remove libfishcamp1