In one of the duplicates (see bug 613988 for details), the reporter has seen an additional error message which I'm not sure if this is directly linked to this issue or not:
Error org.freedesktop.org.DBus.Error.Spawn.ChildExited: Launchelper exited with unknown returncode 1
From the same report it seems this also affects Linux Mint (makes sense, as it is based on Ubuntu). I tried adding a bug watch for this, but I couldn't find Mint in the list of "Also affects distribution".
In one of the duplicates (see bug 613988 for details), the reporter has seen an additional error message which I'm not sure if this is directly linked to this issue or not: .org.DBus. Error.Spawn. ChildExited: Launchelper exited with unknown returncode 1
Error org.freedesktop
From the same report it seems this also affects Linux Mint (makes sense, as it is based on Ubuntu). I tried adding a bug watch for this, but I couldn't find Mint in the list of "Also affects distribution".