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    Subjectdelay before open() works
    Hi -- I notice in 2.4 kernels that there's a delay between completion of
    "modprobe scanner" and when the device file can be successfully opened. I'm
    working on code to power-up devices on-demand.

    I've played some with making scripts to work around this, like

    heyu turn on scanner
    modprobe scanner
    sleep 15
    xsane

    This is pretty gross, since I have to determine the "15" by playing with it,
    and I'm sure it will fail some of the time unless I make it reeeeeally long. I
    suspected this was some hardware issue -- USB latencies on device discovery, or
    boot time for the scanner -- but a friend who isn't attempting to power-up his
    devices says he sees the same behavior when just scripting "modprobe". So it
    appears there's some fairly long delay in the kernel itself.

    Anyone know off-hand what causes this delay, or if there's some way to get
    the open() to block?

    (btw, I'm not subscribed to the list).
    b.c.
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