Arria 10 SoC – USB devices always enumerating as Full-Speed (Yocto 4.1, dwc2)

Thanks for the suggestion YokezhiC_Altera​ .

I applied the udev rules fix, but the issue persists. The application is also running as root, so this does not seem to be a permissions problem.

The device is correctly detected (lsusb shows camera, motor, and audio), which indicates that USB connectivity and basic enumeration are working.

The failure happens during device communication:

- Input/Output control transfer failed

- incomplete reads (expected X bytes)

- unexpected USB disconnect

This points to a low-level issue, possibly related to the dwc2 driver or hardware limitations for isochronous transfers (potential USB bus saturation).

Full console output attached:

root@arria10-ea700498022f:~/app# ./kinect_test_app

send_cmd: Input control transfer failed (18)

[ 340.405365] usb 1-1.3: USB disconnect, device number 7

freenect_fetch_reg_info: send_cmd read 18 bytes (expected 118)

send_cmd: Output control transfer failed (-1)

freenect_fetch_reg_const_shift: send_cmd read -1 bytes (expected 8)

freenect_camera_init(): Failed to fetch const shift for device

Device 0x51fda0 open during shutdown, closing...

root@arria10-ea700498022f:~/app# [ 343.517208] usb 1-1.3: new high-speed USB device number 8 using dwc2

root@arria10-ea700498022f:~/app# lsusb -t

/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc2/1p, 480M

|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/3p, 480M

|__ Port 1: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M

|__ Port 2: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M

|__ Port 3: Dev 8, If 0, Class=Vendor Specific Class, Driver=, 480M

root@arria10-ea700498022f:~/app# lsusb

Bus 001 Device 008: ID 045e:02ae Microsoft Corp. Xbox NUI Camera

Bus 001 Device 003: ID 045e:02b0 Microsoft Corp. Xbox NUI Motor

Bus 001 Device 004: ID 045e:02ad Microsoft Corp. Xbox NUI Audio

Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub