problem reading device libusb


the conditions this: i have usb device (a tradition device i'm perplexing pronounce to) twin endpoints, minute device, reading device. both bulk transfers. each communication transaction takes form (1) management device (2) review response. i'm controlling libusb (version 0.1 rather 1.0 beta) indeed perform communications.



on windows, well. i bond device, explain interface promulgate happily. however, ubuntu (a customary disrespectful desktop install), while i bond device it, review operations destroy blunder "error submitting urb: unfair argument" reported libusb (error formula -22).



if i check /var/log/messages i warning summary logged same review attempted: "sysfs: register filename 'usbdev4.3_ep81' created" - tallies device (it indeed sight it's endpoint 81 i'm perplexing review from).



so... anyone seen identical problem controlling libusb, have any thought repair it?



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