[Bug 1610721] Re: Ctrl+S in terminal causes shutdown/reboot (init) to hang

[Brian Murray]

** Package changed: ubuntu => systemd (Ubuntu)

** Tags added: xenial

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Title:
  Ctrl+S in terminal causes shutdown/reboot (init) to hang

Status in systemd package in Ubuntu:
  New

Bug description:
  1. Boot an Ubuntu 16.04 machine that doesn't have an X server installed
  2. When you get the terminal log-in prompt (on tty1), instead of logging in, press Ctrl+S to stop terminal flow
  3. Connect to the machine via SSH
  4. Run "sudo init 0" via SSH

  The init command hangs. Only when you press Ctrl+Q in the terminal
  does the machine shut down.

  This behavior is confusing when you accidentally hit Ctrl+S. It also
  means that you cannot shut down or reboot the machine remotely if
  someone has pressed Ctrl+S locally.

  Pressing the power button instead of running "init 0" produces the
  behavior as well - nothing happens until you press Ctrl+Q.

  I'm attaching a screen recording to illustrate the problem.

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