Re: [Devil-linux-develop] Serial Console - Success!!

[Heiko Z. <he...@zu...>]

Thanks for all the stuff, I'll added it to my todo list.

Heiko

> Okay folks, I have tested and perfected the serial console booting.
>
> Why not submit a patch?  I suck at making patches (lame, I know).  They
> are always wrong.  Besides, the steps are very simple (3 lines).
>
> 1 - Modify scripts/build-iso
> Find this line:
>
> BOOT_OPTIONS_DL="root=/dev/ram0 initrd=/boot/initrd.gz init=/linuxrc
> $BOOT_OPTION_RAMDISK"
>
> and turn it into this line:
>
> BOOT_OPTIONS_DL="root=/dev/ram0 initrd=/boot/initrd.gz init=/linuxrc
> $BOOT_OPTION_RAMDISK console=tty0 console=tty0,9600n8 "
>
> This change is enough to allow kernel boot messages to populate COM1.
> It is also enough to create a boot prompt...but ONLY in single user mode
> (init 1).  We need this in multi-user modes (3,5).
>
> 2 - Modify /etc/inittab
> Append the following line to your inittab file:
> S0:2345:respawn:/sbin/agetty -L 9600 ttyS0 vt102
>
> 3 - Modify /etc/securetty (optional)
> Append:
> ttyS0
> to your securetty file.
> If you do not, you have to log in as a regular user and su root.
>
> **** YOU ARE DONE - REBOOT and ENJOY ****
>
> Notes:
> 1 - For those concerned with systems W/O a serial port.
> I have a Laptop WITHOUT a serial port.  I booted the DL image on it and
> did not receive any errors or weird messages.  More testing is welcome,
> but I am confident that the kernel boot change (scripts/build-iso) is
> harmless for 99.99999% of systems out there.
>
> 2 - Why agetty instead of mgetty?
> Beats me!  I wasted hours trying to make mgetty work.  It DID work, but
> with a glitch:  you could only log in once!  Any attempt to log in again
> would render the serial port useless till the next reboot!  No matter
> what I tried to do, mgetty just would NOT give me a login prompt again
> till a reboot.  I looked at my SuSE box, and commented out in their
> inittab was "agetty".  Hey, if SuSE can do it, so can we!
>
> --
> Have a great day
>
> Peter Frischknecht
> Empowering Solutions, Inc.
> http://www.empoweringsolutions.com
> AIM: esipeterf
>
>
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-- 
Regards
  Heiko Zuerker
  http://www.devil-linux.org