Date: Sun, 24 Aug 2003 20:18:07 +0200 (CEST) From: Thorsten Kuehnemann <Thorsten.Kuehnemann@Hamburg.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: i386/55930: partly configured serial port freezes system Message-ID: <200308241818.h7OII7Gj000760@ef80.jnx.de> Resent-Message-ID: <200308241820.h7OIKCu1024036@freefall.freebsd.org>
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>Number: 55930
>Category: i386
>Synopsis: partly configured serial port freezes system
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Aug 24 11:20:11 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator: Thorsten Kuehnemann
>Release: FreeBSD 5.1-RELEASE-p2 i386
>Organization:
private
>Environment:
Booting FreeBSD while BIOS serial ports are configured to "auto"
System: FreeBSD ef80.jnx.de 5.1-RELEASE-p2 FreeBSD 5.1-RELEASE-p2 #0: Wed Aug 20 13:41:44 CEST 2003 tk@ef80.jnx.de:/home/usr/obj/home/usr/src/sys/GENERIC-DEBUG i386
The kernel is GENERIC but the line
"makeoptions DEBUG=-g"
was made active in GENERIC-DEBUG.
Pentium1-233 on a Shuttle HOT565-Board with Award BIOS.
>Description:
While booting the machine freezes while or right after
displaying the loginprompt at the console.
These are the problematic kernel messages:
kernel: sio0: configured irq 4 not in bitmap of probed irqs 0
kernel: sio0: port may not be enabled
kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
kernel: sio0: type 8250 or not responding
kernel: sio1: configured irq 3 not in bitmap of probed irqs 0
kernel: sio1: port may not be enabled
In the BIOS the configuration of the serial lines was set to
"Auto".
>How-To-Repeat:
Try to boot FreeBSD with a partly or unconfigured serial ports.
If the mentioned error messages are found, you will get a
freeze (earlier or later).
>Fix:
After enabling the serial ports in BIOS giving an I/O and
IRQ the problem disappears and the kernel messages are:
kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
kernel: sio0: type 16550A
kernel: sio1 at port 0x2f8-0x2ff irq 3 on isa0
kernel: sio1: type 16550A
You will find a dozen PR's containing the text
"sio0: configured irq "
with hang or panic problems.
I have had two different machines with the same problem
solved by configuring the serial ports in the BIOS.
>Release-Note:
>Audit-Trail:
>Unformatted:
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