Am Montag, 4. Mai 2009 11:04:38 schrieb Vincent Del Medico: > Then, when I launch any program opening the /dev/ttyACM0 interface, it > goes very very very slowly ... > I suppose there's still something to change. Good. We are getting somewhere. Please check your log files. acm_tty_write() should write debbuging output. Regards Oliver -- 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