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[Gunnar Hjalmarsson <799950@xxxxxxxxxxxxxxxxxx>]

I was not clear about it when submitting this report, but have come to
understand it afterwards. Should have invalidated this bug myself;
sorry.

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https://bugs.launchpad.net/bugs/799950

Title:
  Can't launch guest session from a LightDM session

Status in “gdm-guest-session” package in Ubuntu:
  Invalid
Status in “lightdm” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: gdm-guest-session

  When in a LightDM session (Natty or Oneiric) gdm-guest-session does
  not work:

  ~$ guest-session --no-lock
  Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.DisplayManager was not provided by any .service files
  ~$

  The fix in bug 795723 was not sufficient. Maybe something like this is needed in lightdm:
  http://bazaar.launchpad.net/~ubuntu-desktop/gdm/ubuntu/view/head:/debian/patches/ubuntu_guest_session.patch

  As a side note, gdm-guest-session does not work in Oneiric with gdm 3 (built from my latest merge proposal) either, but in that case there is no error message. The only thing printed is something like:
      method return sender=:1.8 -> dest=:1.61 reply_serial=2
         object path "/org/gnome/DisplayManager/Display2"
  but that's printed also in Natty with gdm 2 where it works.

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