Simone Gotti wrote:
Hi,

I've already wrote about this bug on the usb-user mailing list and on the
http://bugme.osdl.org/show_bug.cgi?id=1873

One bug is that for some reason the uhci-hcd driver is failing the requests from "usbmodules". Unmounting "usbfs" prevents "usbmodules" from running.

This could very easily be the bug where UHCI garbages the USB data
toggle when control queueing is in use ... it shouldn't be patching
the toggles after they're set up, that's only for queues of bulk
or interrupt transfers.  I'm not sure what happened to the patch
which fixed that, it was available last summer.

As for the "hci0 isoc rx submit" messages, that seems strange.
On the other hand it's politely returning -22 ("-EINVAL") so
that's probably a different bug ... like maybe the driver isn't
setting urb->interval.  (2.4 kernels always assumed intervals
of exactly one frame, which was wrong since iso periods have
a bigger range than that.)

- Dave




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