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Re: Problem w/ serial console after power-on

To: linux-mips@oss.sgi.com
Subject: Re: Problem w/ serial console after power-on
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Wed, 11 Oct 2000 17:35:36 +0200
In-reply-to: <20001011091831.A11757@lug-owl.de>; from jbglaw@lug-owl.de on Wed, Oct 11, 2000 at 09:18:32AM +0200
References: <20001011013803.A5873@lug-owl.de> <20001011074850.A999@excalibur.cologne.de> <20001011091831.A11757@lug-owl.de>
Sender: owner-linux-mips@oss.sgi.com
On Wed, Oct 11, 2000 at 09:18:32AM +0200, Jan-Benedict Glaw wrote:

> [Nonfunctional null modem cable]
> 
> > Well known effect :-)
> > I have a "normal" 7-wire-nullmodem cable that works fine when connecting
> 
> Yes, that's true...
> 
> > The soloution: use a 3-wire-nullmodem cable and inside each of the
> > connectors connect RTS-CTS and DTR-DSR-DCD.
> 
> Oh, where's my foot? ...want to shoot it;)

No probleem with knocking out hardware handshaking of the serial console
like that.  You can't do rts-cts or you risk hard to track temporary
freezes of the machine.  It's been what has caused the freezes of
oss.sgi.com some time ago ...

  Ralf

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