From owner-freebsd-bugs Tue Jan 9 21:58:12 2001 Delivered-To: freebsd-bugs@freebsd.org Received: from mailman.zeta.org.au (mailman.zeta.org.au [203.26.10.16]) by hub.freebsd.org (Postfix) with ESMTP id 2B6CC37B400 for ; Tue, 9 Jan 2001 21:57:55 -0800 (PST) Received: from bde.zeta.org.au (bde.zeta.org.au [203.2.228.102]) by mailman.zeta.org.au (8.9.3/8.8.7) with ESMTP id QAA01971; Wed, 10 Jan 2001 16:57:47 +1100 Date: Wed, 10 Jan 2001 16:58:39 +1100 (EST) From: Bruce Evans X-Sender: bde@besplex.bde.org To: bauerp Cc: freebsd-bugs@FreeBSD.ORG Subject: Re: serial port problems In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 4 Jan 2001, bauerp wrote: > I hope this is something that can be addressed. Last night i went to > attach a console to a switch i was working on. Every time i went to > attach to the serial port my system locked. cu -l /dev/cuaa0 minicom and > tip all displayed the same results. > > I looked through dmesg to see nothing out of the ordinary. sio0 and sio1 > found properly, all appeared normal. Fortunately being untrusting of pc > hardware i checked the bios to find that the serial ports had been > disabled. After re-enabling them this behavior went away. > > Is it possible to have some change in status mentioned in dmesg stating > that the serial ports are infact not operational? Probing them and > assigning irq's to the device that isn't enabled is not very intuitive > when it comes to trouble shooting this. 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. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message