Comments on: Debian with GRUB2 and serial connection

By: Emmanuel Kasper

Emmanuel Kasper — Sat, 10 Mar 2012 22:56:25 +0000

You should use GRUB_CMDLINE_LINUX instead of GRUB_CMDLINE_LINUX_DEFAULT otherwise you’ll miss the console when you boot in rescue ( single user ) mode via a grub entry.

By: How to install Vyatta 6.1 Core LiveCD on Qemu image in Linux « Brezular's Technical Blog

Fri, 12 Nov 2010 23:01:01 +0000

[...] thanks to Petr’s blog [...]

By: Petr Ruzicka

Petr Ruzicka — Sun, 03 Jan 2010 08:45:23 +0000

115200 is much faster, but most devices like switches, routers and fw are using 9600. So that’s the reason why I’m using 9600 – it’s for compatibility

Good luck…

By: Ian Tomkins

Ian Tomkins — Sat, 02 Jan 2010 16:09:56 +0000

Don’t forget that you also need to add/uncomment an entry to your /etc/inittab file to create a serial console you can login to once the OS is booted.

Something like this:
T0:2345:respawn:/sbin/getty -L ttyS0 9600 vt100

It is also worth saying that everything is more responsive if you increase the rate to 115200 rather than 9600.

By: luciano

luciano — Fri, 11 Dec 2009 10:40:49 +0000

In my Ubuntu 9.10 server installed on an industrial PC (PentiumIII) your suggestion works fine 100%. I can manage my server when i am at work via the local VGA console, and at home, via a Cisco 2500 terminal-server with the ttyS0 and a null-modem cable. I just modified the speed to 19200bps.
Thank You
luciano

By: rené

rené — Tue, 20 Oct 2009 23:45:46 +0000

Hello there,

I came across this post when I searched on how to set up output to go to the serial console when using grub2, and I found something missing in your post: in order to get a terminal on the remote machine, you need to add a line to /etc/inittab (described there).

Anyway – have you managed to make grub2 actually show you the grub menu on the console? I can, for some reason, not get it to show anything but the output from the booting kernel and then the login-prompt and this slightly makes my reason for attaching a console to my machine go away as I might need to change boot parameters in case my remote machine misbehaves (my remote machine is ~100km away, so I can’t just go there and sort things there).

I found numerous other posts like this one, but from people on other distributions, who actively mentions that they get the grub-menu on their console.. so. Your experience, please

PS: I’m using Debian Testing (Squeeze)

By: Zak B. Elep

Zak B. Elep — Mon, 14 Sep 2009 11:21:43 +0000

Hey, thanks for this bit. Came in handy while setting up a sid qemu.