On Thu, Jul 10, 2025 at 09:11:14AM +0000, bugzilla-daemon@xxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=220331 > Issue with a newer hardware with USB DisplayLink adapter, syslog throws > following error about unrecognized device type 0x8312: > > > [ 4.447826] usb 1-8.2.1: New USB device found, idVendor=17e9, > > idProduct=ff00, bbcdDevice=83.12 > > [ 4.447833] usb 1-8.2.1: New USB device strings: Mfr=1, Product=2, > > SerialNumber > > =3 > > [ 4.447835] usb 1-8.2.1: Product: PM1000 > > [ 4.447836] usb 1-8.2.1: Manufacturer: DisplayLink > > [ 4.447837] usb 1-8.2.1: SerialNumber: 9638293100007141 This does not look like an FTDI device and as far as I can see ftdi_sio driver should not even try to bind to it currently as the VID/PID is not in the driver's match table. > > [ 4.479297] usbcore: registered new interface driver ftdi_sio > > [ 4.479363] usbserial: USB Serial support registered for FTDI USB Serial > > Device > > [ 4.480786] ftdi_sio 1-8.2.1:1.0: FTDI USB Serial Device converter > > detected > > [ 4.480848] ftdi_sio ttyUSB0: unknown device type: 0x8312 > > [ 4.480923] ftdi_sio 1-8.2.1:1.1: FTDI USB Serial Device converter > > detected > > [ 4.480957] ftdi_sio ttyUSB1: unknown device type: 0x8312 > > [ 4.486014] ftdi_sio ttyUSB0: unknown device type: 0x8312 > > [ 4.486049] ftdi_sio ttyUSB1: unknown device type: 0x8312 Please post the output of "lsusb -v" for this device. Johan
