Comment 21 for bug 272485

botp

lsub output does not represent what the kernel drivers handle. The names of devices reported are taken from the file /var/lib/misc/usb.ids in the usbutils package which might not have that information (see man lsusb).

When the device is connected look in /var/log/kern.log and you'll see something similar to this:

[13642.447989] usb 2-2: new full speed USB device using uhci_hcd and address 3
[13642.685296] usb 2-2: ch341-uart converter now attached to ttyUSB0