From owner-freebsd-current@FreeBSD.ORG  Fri Dec 17 19:24:02 2004
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From: Randy Bush <randy@psg.com>
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Date: Fri, 17 Dec 2004 11:24:01 -0800
To: FreeBSD Current <freebsd-current@freebsd.org>
Subject: usb-related crash on thinkpad t41
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the crash i described two days ago

  <http://rip.psg.com/~randy/041215.crash>

  o is there in current cvsupped an hour ago

  o is usb related.  if i have nothing plugged into the usb,
    it boots crashes.  if i have something plugged into the
    usb, e.g. a 250g wd disk drive, it boots successfully
    with the dmesg excerpt of 

    acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
    ad0: 57231MB <HTS726060M9AT00/MH4OA68A> [116280/16/63] at ata0-master UDMA100
    uhub2: at uhub1 port 2 (addr 2) disconnected
    umass0: at uhub2 port 2 (addr 3) disconnected
    umass0: detached
    uhub2: detached
    ata1-slave: FAILURE - ATAPI_IDENTIFY timed out
    ata1-slave: FAILURE - ATAPI_IDENTIFY timed out
    ata1-slave: FAILURE - ATAPI_IDENTIFY timed out
    ata1-slave: FAILURE - ATAPI_IDENTIFY timed out
    acd0: FAILURE - ATAPI_RESET timed out
    acd0: CDRW <UJDA755zDVD/CDRW/1.21> at ata1-master UDMA33
    da0 at umass-sim1 bus 1 target 0 lun 0
    da0: <WD 2500JB External 0106> Fixed Direct Access SCSI-0 device 
    da0: 1.000MB/s transfers
    da0: 238475MB (488397168 512 byte sectors: 255H 63S/T 30401C)
    kern_symlink  = 0
    Trying to mount root from ufs:/dev/ad0s1a

  o if i disable acpi, it will boot without a usb device

randy