If I plug in a Creative Soundblaster MP3 USB soundcard into the USB bus, the whole system halts (no reponse from anything-- only solution is a
hardware switchoff).
I narrowed it down to the ehci-hcd module by bringing up all modules
except it, and when it was brought up with the USB soundblaster plugged
in , the freeze happened again (note without the soundblaster plugged in
everything worked fine).
I'll be surprised if it's actually the "plugging in" rather than your usb audio driver binding to it. You ought to be able to turn off hotplug temporarily (echo /bin/true > /proc/sys/kernel/hotplug), rmmod that audio driver, and then enumerate the device.
Is that a high speed device, or were you connecting a full speed device through a high speed hub? The former should work with the latest EHCI patches (rewrite of highspeed iso support). The latter won't work yet (someone would need to write it, using the highspeed support as a model), though it _should_ just fail gracefully.
- Dave
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