Hi Oliver, > the logs show that the driver binds. Maybe you've cut too early. > Is there anything in the logs when you try to use the device? There is now, here it goes (see below). I did "cat /dev/ttyACM0" three times shortly after cdc_acm was loaded. As you can see, the ehci_hcd message didn't appear the first time I tried to use the device. This log was made with the machine the device is meant to be used with, running on 2.6.36 -- let me know if that makes a difference in terms of the logs (3.2.6 behaves exactly the same with every way of access I tried, though, as far as success/failure and error messages go). András [1589149.547320] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters [1589173.000055] usb 1-5.1: link qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589173.000311] usb 1-5.1: unlink qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589173.000327] tty_port_close_start: tty->count = 1 port count = 0. [1589187.620586] ehci_hcd 0000:00:12.2: reused qh ffff880025cdda40 schedule [1589187.620599] usb 1-5.1: link qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589187.620753] usb 1-5.1: unlink qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589187.620775] tty_port_close_start: tty->count = 1 port count = 0. [1589202.153553] ehci_hcd 0000:00:12.2: reused qh ffff880025cdda40 schedule [1589202.153565] usb 1-5.1: link qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589202.153820] usb 1-5.1: unlink qh128-0601/ffff880025cdda40 start 3 [1/2 us] [1589202.153843] tty_port_close_start: tty->count = 1 port count = 0. -- 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
