[Bug 1448171] [NEW] "cannot unlock the session" during upgrade to Kubuntu 15.04

[Leon Maurer]

Public bug reported:

I've tried upgrading two of my computers from Kubuntu 14.10 to 15.04. In
both cases, I started the upgrade, left since it takes a long time to
download, and when I came back I was unable to unlock the screen. I'd
enter my password as usual and be told "cannot unlock the session
because the authentication system failed to work". I tried switching to
a terminal and killing the screen locker, but then I'd just return to a
black screen. I don't want to restart the computers with the install
partly completed (I don't know where it left off), but I don't see any
other options...

** Affects: meta-kde (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  "cannot unlock the session" during upgrade to Kubuntu 15.04

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