Thanks! Alas, that means I have to deal with a fresh install. Which I may do, but it's not the straightforward things I was hoping for.
What I'm really looking for is the sort of upgrade/rollback process I'm used to creating for my production apps. One-button upgrade, one-button rollback.
Looks like Ubuntu isn't there yet. I suppose the easy thing is just to get another disk, clone my existing setup, and do the upgrade. If I don't like it, I'll just swap in the backup disk.
What I'm really looking for is the sort of upgrade/rollback process I'm used to creating for my production apps. One-button upgrade, one-button rollback.
Looks like Ubuntu isn't there yet. I suppose the easy thing is just to get another disk, clone my existing setup, and do the upgrade. If I don't like it, I'll just swap in the backup disk.