Firewire lockup (isight?), due to USB device

Discussion in 'Mac Pro' started by kodiak, Jun 5, 2006.

  1. kodiak macrumors newbie

    Mar 21, 2005

    not sure where to post this... had an imac ppc for long time,
    but some time back found my ipod and itunes would lockup during sync'ing

    i assume hardware failure, but whilst exploring this, due to someone else on macrumours experiencing similar, i found something odd..

    it would appear, that what happens is a USB card reader i have (using std apple driver), somehow locks up the firewire devices.

    Jun 5 18:27:01 mymac kernel[0]: /SourceCache/AppleFWOHCI/AppleFWOHCI-252.4.0/AppleFWOHCI.cpp 3539: ERROR: FireWire (OHCI) Apple ID 31 built-in: handleUnrecoverableErrorInt

    i can now reproduce using these steps:
    a) have ipod and isight plugged in
    b) turn on camera (ichat), start sync ipoc in itunes
    c) plug in card reader into USB
    * all ok at this point,
    d) unplug card reader
    * everything stops, itunes and ipod lock up, ichat/isight freeze
    * above error in system.log

    e) unplug isight, plug it back in
    * itunes/ipod restart copying, isight works

    any ideas?

    im hoping i can work around, but interested if this is
    i) card reader driver fault
    ii) isight fault
    iii) firewire fault

    note: latest versions of osx/firmware are in place
    note: the unplugging of card reader, is just to reproduce... i believe i had similar without unplugging, symptoms however were identical.

    can anyone else reproduce this? a known bug in osx?
  2. mad jew Moderator emeritus

    mad jew

    Apr 3, 2004
    Adelaide, Australia
    I don't have an iSight or USB card reader so I can't help reproduce it, but at a guess I reckon it's a power issue in your USB/Firewire in which case it's an un-fixable aspect of your computer. iSights take up a pooh-load of power. :(

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