Running KStars/Ekos on Ubuntu 20.04 for a couple of years now. Works well for me. Noticed that 21.10 is now available. Anyone have good experience with Ubuntu and have an opinion on 20.04 versus 21.10?
It works fine for me. You might want to use the PPA rather than the version that ships with ubuntu though - it's really old and missing a lot of features from newer releases.
Yes, the pl2303 bug was in 5.13 kernel on 20.04. I reverted to 5.11 kernel. Was assuming 21.10 was on 5.16.x with a fix for the pl2303 bug, but maybe that's a bad assumption?
No. 20.04 was originally released with 5.4. Then with each next release you can upgrade kernel in LTS to same version current Ubuntu release. 5.16 was release this 9th January so too and actually Ubuntu 22.04 will go with 5.15 kernel.