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Re: Serial console to RHEL6 on Dell R310?

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Tim Watts <tw@dionic.net> wrote:
> Has linux (well, udev) made you a /dev/ttyS0 or /dev/ttyS1 device?

	Yes, the devices are there.

crw-------. 1 root root 	4, 64 Jun 13 17:20 /dev/ttyS0
crw-------. 1 root root 	4, 65 Jun 13 17:18 /dev/ttyS1


> Next I'd try
> bash < /dev/ttyS0 > /dev/ttyS0 2>&1
> and see if there's life at the other end.

	Nothing there.  The agetty is running -
 PID	TTY		STAT	TIME	COMMAND
1650	ttyS0	Ss+		0:00	/sbin/agetty /dev/ttyS0 9600 vt100-nav
- but I get nothing back when running that shell.


> stty -a < /dev/ttyS0
> should give you the current serial config.

	That looks OK...not going to retype the whole thing, but:
speed 9600 baud; rows 0; columns 0; line = 0;
- the rest looks pretty normal.

	Now here is the really weird thing...connecting ttyS0 on the target
server to the console port of one of our network switches (with the getty
still running on the server!) and running minicom, I hit Enter a couple
times and see:

ServerIronADX 1000>
ServerIronADX 1000>Red Hat Enterprise Linux Server release 6.1 (Santiago)
Invalid input

and then further intermixed switch login prompts, server login prompts,
and error messages from both devices.  So the server _is_ outputting a
login prompt on the serial console!  But then why doesn't it show up
anywhere else?  This is breaking my brain.  All I can think of is that
there's some misconfiguration somewhere, but some of the hardware is
also doing some autocorrection or something...crazy, but I'm kind of out
of other ideas.


-- 
Oh to have a lodge in some vast wilderness.  Where rumors of oppression
and deceit, of unsuccessful and successful wars may never reach me
anymore.  
	-- William Cowper, 1731 - 1800

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Thread

Serial console to RHEL6 on Dell R310? Jeremiah DeWitt Weiner <jdw@panix.com> - 2011-06-13 21:19 +0000
  Re: Serial console to RHEL6 on Dell R310? Tim Watts <tw@dionic.net> - 2011-06-13 23:45 +0100
    Re: Serial console to RHEL6 on Dell R310? Jeremiah DeWitt Weiner <jdw@panix.com> - 2011-06-14 15:37 +0000
      Re: Serial console to RHEL6 on Dell R310? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2011-06-14 20:25 +0300
        Re: Serial console to RHEL6 on Dell R310? Jeremiah DeWitt Weiner <jdw@panix.com> - 2011-06-16 19:35 +0000
      Re: Serial console to RHEL6 on Dell R310? Bill Marcum <bill@lat.localnet> - 2011-06-14 16:20 -0400
  Re: Serial console to RHEL6 on Dell R310? Todd <Todd@invalid.com> - 2011-06-13 20:51 -0700
    Re: Serial console to RHEL6 on Dell R310? The Natural Philosopher <tnp@invalid.invalid> - 2011-06-14 11:04 +0100
    Re: Serial console to RHEL6 on Dell R310? Doug Freyburger <dfreybur@yahoo.com> - 2011-06-14 14:32 +0000

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