Hello, I bought a new USB-RS232 cable and the system loads ch341.ko for me (Debian with kernel 3.14-2-amd64 and 3.16.0-4-amd64). However this module does not work with my cable (/dev/ttyUSB0 appears but the serial device doesn't work properly) while the driver provided by chip vendor[1] works (this driver doesn't compile on kernel 3.16 anymore but 3.14 is fine). This is dmesg output with the vendor-provided driver. [ 1900.070021] usb 2-1.4: new full-speed USB device number 5 using ehci-pci [ 1900.163218] usb 2-1.4: New USB device found, idVendor=1a86, idProduct=7523 [ 1900.163227] usb 2-1.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 1900.163232] usb 2-1.4: Product: USB2.0-Ser! [ 1900.163887] ch34x 2-1.4:1.0: ch34x converter detected [ 1900.165052] usb 2-1.4: ch34x converter now attached to ttyUSB0 For the record I've used an old cable which works fine with the built-in ch341.ko driver, but unfortunately that cable is not in my hand anymore. [1] http://wch.cn/downloads.php?name=pro&proid=177 Thanks, -Liangent -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html