[BUG]: USBMidi2 driver doesn't support USB devices with invalid iSerialNumber

[Quotation]

Windows Version

26100.7840

Service Installation Method

Other (please indicate below)

SDK version, if appropriate

No response

Location

Other or Unsure (please indicate in additional notes section below)

Type of bug

Other or Unsure (please indicate in additional notes section below)

Steps to reproduce

A USB-MIDI device may have invalid iSerialNumber. For example, in USB Device Descriptor, iSerialNumber = 0x03. But in String Descriptors, there are only 3 descriptors.
USBMidi2 driver doesn't support this kind of devices. An yellow warning sign is shown in Windows Device Manager.
While the old usbaudio driver support this kind of devices.

Expected behavior

A missing SerialNumber string descriptor is not very important IMHO. It can be ignored safely in most situations.

Additional notes

The new USBMidi2 driver was installed automatically by Windows Update a few days ago.

[Psychlist1972]

Thanks. In the meantime, you can switch this device, assuming it is a MIDI 1.0 device, back to the old driver "usbaudio.sys" using the device manager.

Pete
Microsoft

[Psychlist1972]

Can you paste in here a descriptor dump for this device? Use the thesycon descriptor dumper if you can.
https://www.thesycon.de/eng/usb_descriptordumper.shtml

[Quotation]

Can you paste in here a descriptor dump for this device? Use the thesycon descriptor dumper if you can. https://www.thesycon.de/eng/usb_descriptordumper.shtml

`Information for device oodi C2 (VID=0x2471 PID=0xEF08):

---

Connection Information:

Device current bus speed: FullSpeed
Device supports USB 1.1 specification
Device supports USB 2.0 specification
Device address: 0x0004
Current configuration value: 0x01
Number of open pipes: 2

---

Device Descriptor:

0x12 bLength
0x01 bDescriptorType
0x0200 bcdUSB
0x00 bDeviceClass
0x00 bDeviceSubClass
0x00 bDeviceProtocol
0x40 bMaxPacketSize0 (64 bytes)
0x2471 idVendor
0xEF08 idProduct
0x0200 bcdDevice
0x01 iManufacturer "QuotSoft"
0x02 iProduct "oodi C2"
0x03 iSerialNumber
0x01 bNumConfigurations

---

Configuration Descriptor:

0x09 bLength
0x02 bDescriptorType
0x0053 wTotalLength (83 bytes)
0x01 bNumInterfaces
0x01 bConfigurationValue
0x00 iConfiguration
0x80 bmAttributes (Bus-powered Device)
0x19 bMaxPower (50 mA)

Interface Descriptor:

0x09 bLength
0x04 bDescriptorType
0x00 bInterfaceNumber
0x00 bAlternateSetting
0x02 bNumEndPoints
0x01 bInterfaceClass (Audio Device Class)
0x03 bInterfaceSubClass (MIDI Streaming Interface)
0x00 bInterfaceProtocol (Audio Protocol undefined)
0x00 iInterface

MS Interface Header Descriptor:

0x07 bLength
0x24 bDescriptorType
0x01 bDescriptorSubtype
0x0100 bcdMSC
0x0041 wTotalLength (65 bytes)

MS MIDI IN Jack Descriptor:

0x06 bLength
0x24 bDescriptorType
0x02 bDescriptorSubtype
0x02 bJackType
0x01 bJackID
0x00 iJack

MS MIDI OUT Jack Descriptor:

0x09 bLength
0x24 bDescriptorType
0x03 bDescriptorSubtype
0x01 bJackType
0x02 bJackID
0x01 bNrInputPins
0x01 baSourceID(1)
0x01 baSourcePin(1)
0x00 iJack

MS MIDI IN Jack Descriptor:

0x06 bLength
0x24 bDescriptorType
0x02 bDescriptorSubtype
0x01 bJackType
0x03 bJackID
0x00 iJack

MS MIDI OUT Jack Descriptor:

0x09 bLength
0x24 bDescriptorType
0x03 bDescriptorSubtype
0x02 bJackType
0x04 bJackID
0x01 bNrInputPins
0x03 baSourceID(1)
0x01 baSourcePin(1)
0x00 iJack

Endpoint Descriptor (Audio/MIDI 1.0):

0x09 bLength
0x05 bDescriptorType
0x01 bEndpointAddress (OUT endpoint 1)
0x02 bmAttributes (Transfer: Bulk / Synch: None / Usage: Data)
0x0040 wMaxPacketSize (64 bytes)
0x00 bInterval
0x00 bRefresh
0x00 bSynchAddress

MS Bulk Data Endpoint Descriptor:

0x05 bLength
0x25 bDescriptorType
0x01 bDescriptorSubtype
0x01 bNumEmbMIDIJack
0x03 baAssocJackID(1)

Endpoint Descriptor (Audio/MIDI 1.0):

0x09 bLength
0x05 bDescriptorType
0x81 bEndpointAddress (IN endpoint 1)
0x02 bmAttributes (Transfer: Bulk / Synch: None / Usage: Data)
0x0040 wMaxPacketSize (64 bytes)
0x00 bInterval
0x00 bRefresh
0x00 bSynchAddress

MS Bulk Data Endpoint Descriptor:

0x05 bLength
0x25 bDescriptorType
0x01 bDescriptorSubtype
0x01 bNumEmbMIDIJack
0x02 baAssocJackID(1)

Microsoft OS Descriptor is not available. Error code: 0x0000001F

---

String Descriptor Table

Index LANGID String
0x00 0x0000 0x0409
0x01 0x0409 "QuotSoft"
0x02 0x0409 "oodi C2"
0x03 0x0409 Request failed with 0x0000001F

---

Connection path for device:
USB xHCI Compliant Host Controller
Root Hub
oodi C2 (VID=0x2471 PID=0xEF08) Port: 5

Running on: Windows 10 or greater (Build Version 26100)

Brought to you by TDD v2.19.0, Dec 5 2023, 12:08:38
`

[AmeNote-Michael]

What is likely happening here is that there is an index for iserial but is invalid index - driver currently failing initialization - driver would need to be updated to create a default serial number in this case.