====== The haunted device ======

Fehlermeldung journalctl, bei Anschluss Canon EOS 40d

<code>
-- Logs begin at Mon 2020-12-07 17:46:18 CET. --
Dez 04 11:15:20 linuxbox kernel: usb 2-1.7: new high-speed USB device number 7 using ehci-pci
Dez 04 11:15:21 linuxbox kernel: usb 2-1.7: New USB device found, idVendor=04a9, idProduct=3146, bcdDevice= 0.02
Dez 04 11:15:21 linuxbox kernel: usb 2-1.7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dez 04 11:15:21 linuxbox kernel: usb 2-1.7: Product: Canon Digital Camera
Dez 04 11:15:21 linuxbox kernel: usb 2-1.7: Manufacturer: Canon Inc.
Dez 04 11:15:21 linuxbox mtp-probe[73897]: checking bus 2, device 7: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7"
Dez 04 11:15:21 linuxbox mtp-probe[73897]: bus: 2, device: 7 was not an MTP device
Dez 04 11:15:21 linuxbox mtp-probe[73905]: checking bus 2, device 7: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7"
Dez 04 11:15:21 linuxbox mtp-probe[73905]: bus: 2, device: 7 was not an MTP device
Dez 04 11:15:21 linuxbox systemd-udevd[73887]: 2-1.7: Process '/usr/lib/snapd/snap-device-helper bind snap_gphoto2_gphoto2 /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7 189:134' failed with exit code 1.
</code>

Output von lsusb -v
<code>
Bus 002 Device 008: ID 04a9:3146 Canon, Inc. EOS 40D
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x04a9 Canon, Inc.
  idProduct          0x3146 EOS 40D
  bcdDevice            0.02
  iManufacturer           1 Canon Inc.
  iProduct                2 Canon Digital Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0027
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         6 Imaging
      bInterfaceSubClass      1 Still Image Capture
      bInterfaceProtocol      1 Picture Transfer Protocol (PIMA 15470)
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0001
  Self Powered

</code>