[Bug 1527843] Re: systemd-logind failed to enable subscription: launch helper exited with unknown return code 1

[Eric Bruce]

Found your post after I had the exact same problem after installing some
packages, in my case looks like caused by blueman2.0.4-1ubuntu2

You may have a different cause but symptoms looks about the same. I just
got my system back up by running the following from the cmd line once
you log in to the CLI:


sudo start lightdm

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Title:
  systemd-logind failed to enable subscription: launch helper exited
  with unknown return code 1

Status in systemd package in Ubuntu:
  Invalid
Status in systemd source package in Wily:
  Expired

Bug description:
  Started my machine succesfully at night and the next morning the screen is blank/black and no GUI available.
  Switching to TTY1 i got after the login these messages:

  [31989] systemd-logind[4272]: Failed to enable subscription: Launch helper exited with unknown return code 1
  [31989] systemd-logind[4272]: Failed to fully start up daemon: Input/output error

  The much bigger problem is:
  PC does *not* start with normal boot options, i have to choose manually the upstart option in GRUB2.
  #1527806

  It is a fresh installed Xubuntu 15.10, all packages installed via
  Synaptic or CLI.

  
  Xubuntu 15.10

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