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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.mel.connect.com.au!news.syd.connect.com.au!gidora.kralizec.net.au!not-for-mail From: bde@zeta.org.au (Bruce Evans) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: serial console problems Date: 13 Jun 1996 13:44:30 +1000 Organization: Kralizec Dialup Unix Lines: 40 Message-ID: <4po2qu$lfv@godzilla.zeta.org.au> References: <4p9pbn$31o@news.b-1.de.contrib.net> NNTP-Posting-Host: godzilla.zeta.org.au Keywords: serial In article <4p9pbn$31o@news.b-1.de.contrib.net>, Heiko Blume <src@B-1.de.Contrib.Net> wrote: >this should most probably go into the FAQ/Handbook. i've setup a serial >console like this: > >- make new kernel with "options COMCONSOLE" > >- cd /sys/i386/boot/biosboot/ >- enable "-DFORCE_COMCONSOLE" in the Makefile >- make clean; make; make install > >- disklabel -B sd0 > >which kind of works if i leave the VGA and keyboard installed. >if i remove them the kernel will display a nice panic message >on the serial console when/after probing for sc0 :-( Disable or don't configure any *GA console drivers if you don't have a *GA. The sc0 probe always succeeds and in some cases when there is no *GA, the driver apparently defaults to a VGA and follows non-existent VGA BIOS pointers. >also, the first text that appears on the serial console >is from the kernel itself. i don't get the boot block >output, which appears on the VGA instead. not good, i'd like >to get the boot prompt on the serial :-( Using FORCE_COMCONSOLE should have made the initial prompt go to the serial console. Perhaps the new bootstrap didn't actually get installed. >i will now try a kernel without the console driver (sc0), >but that's not what i intended to do, actually. Just disable it. You can skip rebuilding a new kernel with "options COMCONSOLE" if you disable all non-serial consoles. Then the console defaults to sio0. This is only useful if you don't have or want to use a screen/keyboard of course. -- Bruce Evans bde@zeta.org.au