Date: Mon, 13 Sep 2010 18:59:58 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: jhb@freebsd.org (John Baldwin) Cc: freebsd-stable@freebsd.org, Stefan Bethke <stb@lassitu.de>, freebsd@jdc.parodius.com Subject: Re: Serial console problems with stable/8 Message-ID: <201009131659.o8DGxwvF044463@lurza.secnetix.de> In-Reply-To: <201009131223.25011.jhb@freebsd.org>
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John Baldwin wrote: > On Monday, September 13, 2010 11:55:27 am Oliver Fromme wrote: > > I think the boot.config stuff might be a red herring. > > The console breaks (i.e. freezes) as soon as I try to run > > a getty process on it -- That seems to indicate that getty > > does *something* to the console device which causes the > > problem. The wchan "ttydcd" seems to indicate is has > > something to do with carrier detection or flow control. > > This points to the uart driver as the culprit which > > replaced sio. > > Well, /dev/ttyXX have always waited for carrier detect, whereas > /dev/cuaXX (the call-out devices) have not. Well, before the update I had ttyd0 in /etc/ttys (this is the default in FreeBSD 7.x), so it should have waited for carrier detect, too. > That was so that you could hook a modem up to a serial port and getty > would not return from open(2) and print a login banner until someone > dialed the modem and connected. I think Jeremy has already given you > some good things to try (such as 3wire.9600) to debug this instead. Yes, I will try that ... But with the 3wire entry I won't have any flow control at all, so output can be lost, right? Doesn't sound like a good solution. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "Documentation is like sex; when it's good, it's very, very good, and when it's bad, it's better than nothing." -- Dick Brandon
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