From owner-freebsd-stable Sat Oct 19 20:49:21 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BDD8837B401 for ; Sat, 19 Oct 2002 20:49:17 -0700 (PDT) Received: from kendra.ne.client2.attbi.com (kendra.ne.client2.attbi.com [24.147.23.83]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2D37A43E8A for ; Sat, 19 Oct 2002 20:49:17 -0700 (PDT) (envelope-from ahd@kew.com) Received: by kendra.ne.client2.attbi.com (Postfix, from userid 1001) id C579515536; Sat, 19 Oct 2002 23:49:05 -0400 (EDT) To: stable@freebsd.org Subject: solid lockup at serial port accesss Message-Id: <20021020034905.C579515536@kendra.ne.client2.attbi.com> Date: Sat, 19 Oct 2002 23:49:05 -0400 (EDT) From: ahd@kew.com (Drew Derbyshire) Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I am running FreeBSD 4.6.2-RELEASE-p2 on two similar Dell GX1 PII/350 machines each with a USR PCI modem. The machines have virtually the same kernel configuration, except that one has 3 ISA ports defined and the other 4. (Other differences exist, for example different versions of a 2940 SCSI card, and one system has Maxtor ATA133 drives while the other has WDC SCSI drives; the kernel includes sufficent support for both.) On each machine, the PCI modem is moved to the first open sio device, for example sio3 on the machine I included the boot log for below. If the device is opened, for example a simple: echo atz > /dev/cuaa3 The system hangs. Hard. Not even the carriage return gets printed. I can't even switch virtual consoles. It also did this with an ISA modem ~ two weeks ago. What gives? I'm building with the kernel debugger, but I wonder if I'll be able to get into it. *help* -ahd- ------------------------------------------------------------------------------- from pciconf -l -v sio3@pci2:10:0: class=0x070002 card=0x00d312b9 chip=0x100812b9 rev=0x01 hdr=0x00 vendor = '3COM Corp, Modem Division (Formerly US Robotics)' device = '3cp803598 USR 56k Internal Modem' class = simple comms subclass = UART Copyright (c) 1992-2002 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.6.2-RELEASE #1: Sun Sep 15 16:48:13 EDT 2002 ahd@pandora.hh.kew.com:/usr/scratch/obj/usr/src/sys/DELL_GX1 Timecounter "i8254" frequency 1193182 Hz CPU: Pentium II/Pentium II Xeon/Celeron (347.67-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x651 Stepping = 1 Features=0x183f9ff real memory = 268435456 (262144K bytes) config> q avail memory = 257634304 (251596K bytes) Preloaded elf kernel "kernel" at 0xc0382000. Preloaded userconfig_script "/boot/kernel.conf" at 0xc038209c. VESA: v2.0, 4096k memory, flags:0x0, mode table:0xc031d762 (1000022) VESA: ATI MACH64 Pentium Pro MTRR support enabled md0: Malloc disk Using $PIR table, 9 entries at 0xc00fc670 apm0: on motherboard apm: found APM BIOS v1.2, connected at v1.2 npx0: on motherboard npx0: INT 16 interface pcib0: on motherboard pci0: on pcib0 pcib1: at device 1.0 on pci0 pci1: on pcib1 pci1: at 0.0 irq 11 isab0: at device 7.0 on pci0 isa0: on isab0 atapci0: port 0xffa0-0xffaf at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 uhci0: port 0xcce0-0xccff irq 11 at device 7.2 on pci0 usb0: on uhci0 usb0: USB revision 1.0 uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered chip1: port 0x850-0x85f at device 7.3 on pci0 atapci1: port 0xcca0-0xccaf,0xccb8-0xccbb,0xccc0-0xccc7,0xccd0-0xccd3,0xccd8-0xccdf mem 0xff000000-0xff003fff irq 10 at device 13.0 on pci0 ata2: at 0xccd8 on atapci1 ata3: at 0xccc0 on atapci1 ahc0: port 0xc800-0xc8ff mem 0xff005000-0xff005fff irq 11 at device 14.0 on pci0 aic7895: Ultra Wide Channel A, SCSI Id=7, 32/253 SCBs ahc1: port 0xc400-0xc4ff mem 0xff004000-0xff004fff irq 11 at device 14.1 on pci0 aic7895: Ultra Single Channel B, SCSI Id=7, 32/253 SCBs pcib2: at device 15.0 on pci0 pci2: on pcib2 sio0: <3COM PCI FaxModem> port 0xdcf8-0xdcff irq 11 at device 10.0 on pci2 sio0: moving to sio3 sio3: type 16550A xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xcc00-0xcc7f mem 0xff006000-0xff00607f irq 11 at device 17.0 on pci0 xl0: Ethernet address: 00:c0:4f:74:b8:56 miibus0: on xl0 xlphy0: <3Com internal media interface> on miibus0 xlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto orm0: