Title changed from typo on reboot to typo when reboot and poweroff

To me that glitch looks less like a typo, but rather like one message printed on top of another.

You are right. reboot and poweroff are symbolic link to halt. halt is using shutdown. According to Debian Wheezy it should look that:

root@devuan-jessie:~#poweroff;

Broadcast message from root@devuan-jessie (tty1) (Sat May 21 10:20:39 2016):

The system is going down for system halt NOW!
..

I assume that\is somewhere missing.

FWIW: I just tried to reproduce it with a proper Devuan Ascii(sic!) VM and one of the unofficial Jessie beta1 live CDs. In both cases it looked like your Wheezy example, i.e. an empty line printed between "Broadcast ..." and "The system ...". I wonder, if your original observation might have been caused be something peculiar to your system?

Made the issue confidential

@Irrwahn what is Your hostname - 'devuan'? If yes change it to 'devuan-jessie' in /etc/hosts and /etc/hostname to reproduce issue. If I change hostname to 'devuan' empty line is printed.

Made the issue visible

I haven't reproduced anything yet, but sounds like surprisingly connected to debian-installer#53

Pawe\xc5\x82: Using a hostname containing a hyphen I was indeed able to reproduce it on an Ascii VM (have not tried on Jessie, though). BTW:/etc/hostsdoes not seem to play a role here, but I already expected that. With "devuanjessie" as a hostname it worked fine. Just for fun I changed it to "devuan.jessie" (period instead of hyphen) and the problem reappeared.

But it gets even weirder: Next, I changed it to "devuan1jessie" and the original problem was there; the same happened for "devuanjessie1"!

Apparently something that parses /etc/hostname chokes on anything in/etc/hostnamethat is not a lower case letter.

Jaromil : I agree it looks incredibly related. However, I tried to reproduce it (by invoking update-grub between reboots), but failed to succeed.

Clearly something fishy is going on here, but more investigation is needed to isolate the cause of this glitch. Until then the only workaround seems to be to only use lower case ASCII characters for the hostname, or just live with the glitch. Not exactly ideal.

EDIT: For the record, I confirmed my findings using a freshly installed Jessie beta1 VM.

Seems to work fine now. May have been an issue with an early version, please reopen if it persists in ascii.

# halt

Broadcast message from root@ascii-test (pts/0) (Tue Oct 31 18:26:30 2017):
The system is going down for system halt NOW!

closed