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New: FTDI serial IO - unknown device type: 0x8312

Bug 220331 [email protected] 3 participants 7 messages Jul 10, 2025 – Aug 27, 2025 USB

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#0 lore raw

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: [email protected]
          Reporter: [email protected]
        Regression: No

Issue with a newer hardware with USB DisplayLink adapter, syslog throws following error about unrecognized device type 0x8312:

Quoted 19 lines
[    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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author
#1 lore raw

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

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

Artem S. Tashkinov ([email protected]) changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
         Resolution|---                         |WILL_NOT_FIX

--- Comment #1 from Artem S. Tashkinov ([email protected]) ---
1. This is an ancient kernel
2. Feature requests are not supported here

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author
#2 lore raw

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

In reply to [email protected]

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

tomh ([email protected]) changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|RESOLVED                    |REOPENED
         Resolution|WILL_NOT_FIX                |---

--- Comment #2 from tomh ([email protected]) ---
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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#3 lore raw

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

Quoted 2 lines · On Mon, Jul 21, 2025 at 02:58:05PM +0000, [email protected] 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 [email protected] mailing list.

author
#4 lore raw

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

In reply to [email protected]

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

--- Comment #3 from Greg Kroah-Hartman ([email protected]) ---

Quoted 2 lines · On Mon, Jul 21, 2025 at 02:58:05PM +0000, [email protected] 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 [email protected] mailing list.

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#5 lore raw
In reply to [email protected]
Quoted 13 lines · On Thu, Jul 10, 2025 at 09:11:14AM +0000, [email protected] 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:

Quoted 8 lines
[    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.

Quoted 11 lines
Quoted 11 lines
[    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

author
#6 lore raw

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

In reply to [email protected]

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

--- Comment #4 from Johan Hovold ([email protected]) ---

Quoted 13 lines · On Thu, Jul 10, 2025 at 09:11:14AM +0000, [email protected] 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:

Quoted 8 lines
[    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.

Quoted 11 lines
Quoted 11 lines
[    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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