Date: Mon, 22 Jan 2001 11:53:25 -0600 (CST) From: Paul Bauer <bauerp@bigfoot.com> To: Bruce Evans <bde@zeta.org.au> Cc: Andy Farkas <andyf@speednet.com.au>, freebsd-bugs@FreeBSD.ORG Subject: Re: serial port problems Message-ID: <Pine.NEB.4.10.10101221151250.5791-100000@corona.housebsd.org> In-Reply-To: <Pine.BSF.4.21.0101222056080.28114-100000@besplex.bde.org>
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I also am unsure why this is happening. It is easy to recreate though. turn off the serial ports in the bios of your x86 machine then boot. Once booted try to attach to the serial port using your favorite utility. tip and cu both had the same results for me. Be prepared to hard rebootand to fscck the system. you may want to unmount everything not in use first to save yourself a little time. On Mon, 22 Jan 2001, Bruce Evans wrote: > Date: Mon, 22 Jan 2001 21:00:41 +1100 (EST) > From: Bruce Evans <bde@zeta.org.au> > To: Andy Farkas <andyf@speednet.com.au> > Cc: bauerp <bauerp@bigfoot.com>, freebsd-bugs@FreeBSD.ORG > Subject: Re: serial port problems > > On Sat, 20 Jan 2001, Andy Farkas wrote: > > > On Wed, 10 Jan 2001, Bruce Evans wrote: > > > The driver already does an unreasonable amount of checking at probe > > > time that the ports work. It even checks that interrupts work. > > > Non-working interrupts caused the probe to fail in FreeBSD-2, but now > > > certain types of broken interrupts only result in a boot message like > > > "configured irq 4 not in bitmap of probed irqs 0". I don't know how > > > this particular failure would cause a lockup. > > > Well, I think something is wrong with the probe, 'cause this machine does > > not have any serial ports (it used to) yet says: > > > > ... > > FreeBSD 4.1.1-STABLE #0: Sat Oct 14 19:20:47 EST 2000 > > ... > > sio0: configured irq 4 not in bitmap of probed irqs 0 > > sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 > > sio0: type 8250 > > ... > > > > The probe did not pick up the fact that there is no serial port. > > > > This is an old dual P90 MB with no onboard coms or lpt. > > I don't see how it can get that far without there being something very > much like an 8250 at port 0x3f8, unless the undocumented no-probe flag > (0x40000) somehow gets set. The flag is only supposed to be set > internally for pccards. It's interesting that only an 8250 is found. > > Bruce > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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