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

[Jo Liss]

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.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1610721/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Dan Streetman (ddstreet)]

please reopen if this is still an issue