Same problem here with TMote Sky sensor motes (http://www.moteiv.com/products/tmotesky.php). This is what happens when I try to plug one:
[ 1442.540000] drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI USB Serial Device [ 1442.540000] ftdi_sio 1-2:1.0: FTDI USB Serial Device converter detected [ 1442.540000] drivers/usb/serial/ftdi_sio.c: Detected FT232BM [ 1442.540000] usb 1-2: FTDI USB Serial Device converter now attached to ttyUSB0 [ 1442.540000] usbcore: registered new interface driver ftdi_sio [ 1442.540000] drivers/usb/serial/ftdi_sio.c: v1.4.3:USB FTDI Serial Converters Driver [ 1442.752000] usb 1-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1 [ 1442.756000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0 [ 1442.756000] ftdi_sio 1-2:1.0: device disconnected I also had to uninstall the brltty package. -- brltty driver interferes with USB serial dongles https://launchpad.net/bugs/96147 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs