On Wed, 30 Apr 2014, Matteo Fortini wrote: > Thank you Alan, > here you go: http://pastebin.com/txu8M68L we included the register file > both before and after the hangup, with a 1s interval. Thanks. This confirms the reason for the problem. It's a hardware bug in the OHCI controller; after completing a transfer, the controller didn't add the Transfer Descriptor to the Done List. I'm working on a patch to detect this sort of mistake and recover from it. I'll let you know when it's ready for testing. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html