[Buildroot] Raspberry + Usb to TTL Serial Cable issue
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Sat Jul 19 15:41:11 UTC 2014
Dear Sylvain LG,
On Sat, 19 Jul 2014 17:35:42 +0200, Sylvain LG wrote:
> I changed tty1 to ttyAMA0 and I can log now.
>
> Only kernel messages are displayed, but no daemons messages (for instance,
> "Starting sshd" or the public/private key pair generation).
>
> Why?
Those messages are displayed on the console, so if you have
console=<your serial port> you should see them.
> Can Buildroot be set to configure more than one tty?
There are two separate things:
*/ The kernel console. This one is configured using the console=
kernel parameter, and you can have potentially several ones. This
is where the kernel messages go, as well as the messages of all
userspace processes that do not explicitly define a tty
in /etc/inittab.
*/ The tty on which getty processes are started (getty is the program
that asks for a login). By default, Buildroot only starts one, but
you can create your own /etc/inittab (stored for example in a root
filesystem overlay), and in this case you can start as many getty
programs as you want, on whichever ttys you want.
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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