G29 connected, appears as DFEX then we send command to get it to reconnect
--
Sep 28 12:30:32 retrobox kernel: [11078.904047] usb 2-1: new full-speed USB device number 2 using uhci_hcd
Sep 28 12:30:32 retrobox kernel: [11079.077104] usb 2-1: New USB device found, idVendor=046d, idProduct=c294
Sep 28 12:30:32 retrobox kernel: [11079.077115] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 28 12:30:32 retrobox kernel: [11079.077122] usb 2-1: Product: G29 Driving Force Racing Wheel
Sep 28 12:30:32 retrobox kernel: [11079.077128] usb 2-1: Manufacturer: Logitech
Sep 28 12:30:32 retrobox mtp-probe: checking bus 2, device 2: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1"
Sep 28 12:30:32 retrobox mtp-probe: bus: 2, device: 2 was not an MTP device
Sep 28 12:30:32 retrobox kernel: [11079.266693] input: Logitech G29 Driving Force Racing Wheel as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/0003:046D:C294.0001/input/input9
Sep 28 12:30:32 retrobox kernel: [11079.267441] logitech 0003:046D:C294.0001: input,hidraw0: USB HID v1.00 Joystick [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input0
Sep 28 12:30:32 retrobox kernel: [11079.276117] usbcore: registered new interface driver usbhid
Sep 28 12:30:32 retrobox kernel: [11079.276127] usbhid: USB HID core driver
Sep 28 12:30:32 retrobox kernel: [11079.320193] usb 2-1: USB disconnect, device number 2
Sep 28 12:30:32 retrobox systemd-udevd[243]: error opening USB device 'descriptors' file
Sep 28 12:30:33 retrobox kernel: [11079.944056] usb 2-1: new full-speed USB device number 3 using uhci_hcd
Sep 28 12:30:33 retrobox kernel: [11080.113102] usb 2-1: New USB device found, idVendor=046d, idProduct=c24f
Sep 28 12:30:33 retrobox kernel: [11080.113113] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 28 12:30:33 retrobox kernel: [11080.113120] usb 2-1: Product: G29 Driving Force Racing Wheel
Sep 28 12:30:33 retrobox kernel: [11080.113125] usb 2-1: Manufacturer: Logitech
Sep 28 12:30:33 retrobox kernel: [11080.124431] input: Logitech G29 Driving Force Racing Wheel as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/0003:046D:C24F.0002/input/input10
Sep 28 12:30:33 retrobox kernel: [11080.125134] logitech 0003:046D:C24F.0002: input,hidraw0: USB HID v1.11 Joystick [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input0
Sep 28 12:30:33 retrobox kernel: [11080.126094] logitech 0003:046D:C24F.0002: Force feedback support for Logitech Gaming Wheels
Sep 28 12:30:33 retrobox kernel: [11080.134307] logitech 0003:046D:C24F.0003: hiddev0,hidraw1: USB HID v1.11 Device [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input1
Sep 28 12:30:33 retrobox kernel: [11080.134319] logitech 0003:046D:C24F.0003: not enough values in HID_OUTPUT_REPORT 0 field 0
Sep 28 12:30:33 retrobox kernel: [11080.134339] logitech: probe of 0003:046D:C24F.0003 failed with error -1
Sep 28 12:30:33 retrobox mtp-probe: checking bus 2, device 3: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1"
Sep 28 12:30:33 retrobox mtp-probe: bus: 2, device: 3 was not an MTP device
--

New device has 2 interfaces, the second one is not liked at all... as noted above the probe fails. Also note that there is no report descripter presented in the 2nd interface's '/sys/bus/hid/devices/...' directory


$ lsusb --vv
--
Bus 002 Device 003: ID 046d:c24f Logitech, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x046d Logitech, Inc.
  idProduct          0xc24f 
  bcdDevice           89.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           66
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          4 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              200mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     125
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               2
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               2
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      54
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0014  1x 20 bytes
        bInterval               2
--


$ ls -la /sys/bus/hid/devices/0003\:046D\:C24F.0002/
--
total 0
drwxr-xr-x 6 root root    0 Sep 28 12:37 .
drwxr-xr-x 6 root root    0 Sep 28 12:37 ..
-rw-rw-r-- 1 root root 4096 Sep 28 12:37 alternate_modes
-r--r--r-- 1 root root 4096 Sep 28 12:37 country
lrwxrwxrwx 1 root root    0 Sep 28 12:37 driver -> ../../../../../../../bus/hid/drivers/logitech
drwxr-xr-x 3 root root    0 Sep 28 12:37 hidraw
drwxr-xr-x 3 root root    0 Sep 28 12:37 input
drwxr-xr-x 7 root root    0 Sep 28 12:37 leds
-r--r--r-- 1 root root 4096 Sep 28 12:37 modalias
drwxr-xr-x 2 root root    0 Sep 28 12:37 power
-rw-rw-r-- 1 root root 4096 Sep 28 12:37 range
-r--r--r-- 1 root root 4096 Sep 28 12:37 real_id
-r--r--r-- 1 root root 4096 Sep 28 12:37 report_descriptor
lrwxrwxrwx 1 root root    0 Sep 28 12:37 subsystem -> ../../../../../../../bus/hid
-rw-r--r-- 1 root root 4096 Sep 28 12:37 uevent
--

$ ls -la /sys/bus/hid/devices/0003\:046D\:C24F.0003/
--
total 0
drwxr-xr-x 4 root root    0 Sep 28 12:35 .
drwxr-xr-x 6 root root    0 Sep 28 12:35 ..
-r--r--r-- 1 root root 4096 Sep 28 12:35 country
drwxr-xr-x 3 root root    0 Sep 28 12:35 hidraw
-r--r--r-- 1 root root 4096 Sep 28 12:35 modalias
drwxr-xr-x 2 root root    0 Sep 28 12:35 power
-r--r--r-- 1 root root 4096 Sep 28 12:35 report_descriptor
lrwxrwxrwx 1 root root    0 Sep 28 12:35 subsystem -> ../../../../../../../bus/hid
-rw-r--r-- 1 root root 4096 Sep 28 12:35 uevent
--