[Bug 1389275] Re: Updating from 14.04 to 14.10 created a snapshot, but it did so AFTER updating the sources.

[James Lewis]

+Tim Gardner

I completely agree, I could swear I put update-manager in the bug
originally...   I guess it's not a "published" feature that update-
manager takes a snapshot before upgrading, and there's clearly no GUI
way to roll back, but this is a truely great feature, it saved my bacon
so I'm glad it's there, but I thought it was worth reporting that the
point where the snapshot is taken is a little too late in the process.

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https://bugs.launchpad.net/bugs/1389275

Title:
  Updating from 14.04 to 14.10 created a snapshot, but it did so AFTER
  updating the sources.

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  Using BTRFS to allow snapshot rollback from version updates actually
  worked... I updated from 14.04 to 14.10 on Nov 1st, and encountered a
  problem, I saw that update-manager had taken a snapshot before
  completing the update, but after rollback I found that the snapshot
  was taken AFTER the 14.10 sources had been put in place.

  Clearly the snapshot should be taken before changes are made to the
  package configuration, or rollback will not be complete.

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