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I've been running a mythbuntu machine for the best part of 10 years now. I don't use the MythTV stuff any more but it runs as bit of a quasi home server. Over the years I've set up and configured a LOT of stuff, a lot of it I probably don't even remember. I'd like to keep this machine reasonably up to date but really don't want to do a fresh install and reconfigure everything. Is there a way to migrate the system to something light like say xubuntu and upgrade it to 20.04 without a new install?

At the moment I can't update to 20.04:

phil@htpcserver:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
There is no development version of an LTS available.
To upgrade to the latest non-LTS develoment release 
set Prompt=normal in /etc/update-manager/release-upgrades.

Thanks for any help

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  • Is your home in a separate partition or is it in the same partition as root?
    – To Do
    May 18 '20 at 11:21
  • Home folder is in the same partition
    – pssturges
    May 18 '20 at 23:15
  • I would recommend baking up your data and do a fresh install, but if yo really want to avoid that, create a separate home partition howtogeek.com/116742/…, then do a fresh install of Xubuntu, choose the Something else option and make sure you set the new home partition as your new home.
    – To Do
    May 19 '20 at 6:52
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Mythbuntu is discontinued since 4 years. You can't upgrade to any flavor of 20.04. You have to do a fresh install.

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  • Yeah was hoping to avoid that. Funny though that I was able to upgrade to 18.04 without issue a couple of years ago
    – pssturges
    May 18 '20 at 23:17
  • You can still try with: sudo apt update && sudo apt full-upgrade -y && update-manager -cd May 20 '20 at 4:12
  • Thanks. Well that does give me the option to upgrade to 20.04 (not quite ready to pull the trigger yet). However it's saying that it's a development release. I thought it was a full release by now? I guess this is the reason its not presented as an option with "sudo do-release-upgrade" yet? I'm thinking if I can update to 20.04 at some point I can then install xfce and remove mythbuntu desktop. Is that a reasonable course of action?
    – pssturges
    May 20 '20 at 7:42
  • Don't worry, it's a LTS release, not a Dev release. May 21 '20 at 9:39
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Upgrading to Ubuntu 20 is possible. I went from mythbuntu on Ubuntu 16 -> Ubuntu 18 LTS with no problems. I then upgraded to Ubuntu 20 LTS, and again it went mostly OK.

The one gotcha is that mythfilldatabase takes a very long time (~45 minutes) since moving to 20 and mysql 8.x. Not sure why.

The mythtv project had a page on MySQL tuning, but it's really about MySQL 5.x and several lines of the suggested config file need to be commented out for MySQL 8 to start. And...even with that config, mythfilldatabase still runs slowly.

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  • Thanks. Mythfilldatabase is not an issue for me as I no longer use mythtv
    – pssturges
    Jan 24 at 9:22
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Thanks All, I did manage to get this done some time ago. From memory I ran the command recommended by NicholasSmith above to update to 20.04. I then installed Xubuntu desktop and uninstalled all the mythbuntu stuff. Went surprisingly smoothly as I recall. Still running well.

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