[Bug 220331] New: FTDI serial IO - unknown device type: 0x8312

[Bug 220331] New: FTDI serial IO - unknown device type: 0x8312

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220331

            Bug ID: 220331
           Summary: FTDI serial IO - unknown device type: 0x8312
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: tomas.hanslik@septim.cz
        Regression: No

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
> [    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

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[Bug 220331] FTDI serial IO - unknown device type: 0x8312

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220331

Artem S. Tashkinov (aros@gmx.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WILL_NOT_FIX

--- Comment #1 from Artem S. Tashkinov (aros@gmx.com) ---
1. This is an ancient kernel
2. Feature requests are not supported here

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[Bug 220331] FTDI serial IO - unknown device type: 0x8312

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220331

tomh (tomas.hanslik@septim.cz) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WILL_NOT_FIX                |---

--- Comment #2 from tomh (tomas.hanslik@septim.cz) ---
ad 1. The device is not recognized even in latest kernel 6.15.7 .
ad 2. Where should requests for a newer hadrware support be placed then?

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Re: [Bug 220331] FTDI serial IO - unknown device type: 0x8312

[Greg KH]

On Mon, Jul 21, 2025 at 02:58:05PM +0000, bugzilla-daemon@kernel.org wrote:
> ad 1. The device is not recognized even in latest kernel 6.15.7 .
> ad 2. Where should requests for a newer hadrware support be placed then?

On the linux-usb@vger.kernel.org mailing list.

[Bug 220331] FTDI serial IO - unknown device type: 0x8312

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220331

--- Comment #3 from Greg Kroah-Hartman (greg@kroah.com) ---
On Mon, Jul 21, 2025 at 02:58:05PM +0000, bugzilla-daemon@kernel.org wrote:
> ad 1. The device is not recognized even in latest kernel 6.15.7 .
> ad 2. Where should requests for a newer hadrware support be placed then?

On the linux-usb@vger.kernel.org mailing list.

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Re: [Bug 220331] New: FTDI serial IO - unknown device type: 0x8312

[Johan Hovold]

On Thu, Jul 10, 2025 at 09:11:14AM +0000, bugzilla-daemon@kernel.org 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

[Bug 220331] FTDI serial IO - unknown device type: 0x8312

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220331

--- Comment #4 from Johan Hovold (johan@kernel.org) ---
On Thu, Jul 10, 2025 at 09:11:14AM +0000, bugzilla-daemon@kernel.org 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

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