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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