'09d8 0320' and '09d8 0420' ('vendor' 'product') are serial devices.
This are TWN3 and TWN4 RFID-CardREaders from elatec GmbH.
They work fine with the generic driver.
Here the output of dmesg (TWN4 connected)
[ 837.228021] usb 4-1: new full-speed USB device number 4 using uhci_hcd
[ 837.409161] usb 4-1: New USB device found, idVendor=09d8, idProduct=0420
[ 837.409165] usb 4-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 837.409168] usb 4-1: Product: RFID Device (CDC)
[ 837.409169] usb 4-1: Manufacturer: OEM
[ 837.413225] usbserial_generic 4-1:1.0: Generic device with no bulk
out, not allowed.
[ 837.413234] usbserial_generic: probe of 4-1:1.0 failed with error -5
[ 837.413293] usbserial_generic 4-1:1.1: The "generic" usb-serial
driver is only for testing and one-off prototypes.
[ 837.413295] usbserial_generic 4-1:1.1: Tell linux-usb@vger.kernel.org
to add your device to a proper driver.
[ 837.413297] usbserial_generic 4-1:1.1: generic converter detected
[ 837.413369] usb 4-1: generic converter now attached to ttyUSB2
--
Mit freundlichen Grüßen
Ralf Hartmann
Czarnikauer Str. 14
10439 Berlin
Tel.: +49 171 19 45 770
Fax: +49 30 44 65 29 24
ralfhartm...@gmx.net
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