[Bug 1723644] Missing required logs.

[Ubuntu Kernel Bot]

This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1723644

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1723644

Title:
  NetworkManager hang

Status in linux package in Ubuntu:
  Incomplete
Status in network-manager package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  Recently I had issues with NetworkManager. When I try to restart or close
  NetworkManager, the process hangs. First it sends a SIGTERM to the
  NetworkManager process, and after a while it sends SIGKILL, yet nothing
  happens. After the attempt to restart/close NetworkManager, the OS behaves
  badly:
  - journalctl doesn't work, doesn't output anything, SIGTERMing/SIGABRTing/
  SIGKILLing it causes the kill command to hang (no matter how many times I try
  it), it also hangs the terminal
  - 'sudo dmesg' hangs (killing it with SIGKILL/SIGTERM/SIGABRT hangs the kill
  command, can't close the terminal)
  - the OS won't reboot/suspend/shutdown (it does only after holding the restart
  button)

  Suspending/rebooting normally/shutdowning normally the laptop hangs the OS
  (because of NetworkManager).

  What I've tried:
  - reinstalling NetworkManager (uninstalling it using --purge, installing it clean)
  - deleting ~/.config
  - deleting ~/.cache
  - installing a version from NetworkManager from Debian (version: 1.8.4.2),
  reinstalling NetworkManager from Ubuntu back

   affects ubuntu
   affects ubuntu/network-manager
   affects ubuntu/systemd

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