There is supposed to be a way to upgrade Mythbuntu to the next version by downloading the installer CD ISO file, burning a CD and having the update come from the CD, rather than over the Internet. This is to prevent an over-the-Internet upgrade which literally takes multiple hours.
My goal was to go from 11.04 to 11.10 to 12.04.
I followed this:
They instruct you to boot the pc with the CD, click Install Mythbuntu, and then choose Upgrade from XX to XX.
I backed up my boot partition with clonezilla so I could go back to a working 11.04 if the upgrade went bad.
I didn't back up the recordings partition (/var/lib/mythtv) because it is huge, and it isn't supposed to get touched during an upgrade, anyway.
I put the CD in the drive and booted up to the installer screens.
All seemed to proceed OK and the upgrade even kept my desktop wallpaper and a few folder icons I put on the desktop.
When I got done, I found that ALL my recordings were gone!!
The "/var/lib/mythtv/pretty" folder I put in my last install is gone.
It looks like the installer wiped out the /var/lib/mythtv partition and rebuilt it!
WHAT KIND OF UPGRADE IS THAT?
Isn't the idea of upgrading to only change the operating system files and keep your recordings, etc.???