[libhid-discuss] libhid can not open HID device on Ubuntu

[Ali Asad]

Hi ,

I am using libhid on Ubuntu to connect to a composit USB device that enumerates as a mass storage as well as HID device. When using the sample code of libhid, the call hid_force_open() fails with the following printout, and return code of 12. Any ideas what could cause this.

Much appreciate your help.

regards,
--- asad

NOTICE: hid_init(): libhid 0.2.15+20060325.0.0 is being initialized.
  TRACE: hid_init(): initialising USB subsystem...
  TRACE: hid_init(): scanning for USB busses...
  TRACE: hid_init(): scanning for USB devices...
NOTICE: hid_init(): successfully initialised HID library.
  TRACE: hid_new_HIDInterface(): creating a new HIDInterface instance...
  TRACE: hid_force_open(): forcefully opening a device interface according to matching criteria...
  TRACE: hid_get_usb_handle(): acquiring handle for a USB device...
  TRACE: hid_find_usb_device(): enumerating USB busses...
  TRACE: hid_find_usb_device(): enumerating USB devices on bus 004...
  TRACE: hid_find_usb_device(): inspecting USB device 004/001[0]...
  TRACE: hid_compare_usb_device(): comparing match specifications to USB device...
  TRACE: hid_compare_usb_device(): inspecting vendor ID...
  TRACE: hid_compare_usb_device(): no match on vendor ID.
  TRACE: hid_compare_usb_device(): inspecting product ID...
  TRACE: hid_compare_usb_device(): no match on product ID.
  TRACE: hid_compare_usb_device(): no custom matching function supplied.
NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 004/001[0] does not match 0x05dc.
  TRACE: hid_find_usb_device(): enumerating USB devices on bus 003...
  TRACE: hid_find_usb_device(): inspecting USB device 003/001[0]...
  TRACE: hid_compare_usb_device(): comparing match specifications to USB device...
  TRACE: hid_compare_usb_device(): inspecting vendor ID...
  TRACE: hid_compare_usb_device(): no match on vendor ID.
  TRACE: hid_compare_usb_device(): inspecting product ID...
  TRACE: hid_compare_usb_device(): no match on product ID.
  TRACE: hid_compare_usb_device(): no custom matching function supplied.
NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 003/001[0] does not match 0x05dc.
  TRACE: hid_find_usb_device(): enumerating USB devices on bus 002...
  TRACE: hid_find_usb_device(): inspecting USB device 002/003[0]...
  TRACE: hid_compare_usb_device(): comparing match specifications to USB device...
  TRACE: hid_compare_usb_device(): inspecting vendor ID...
  TRACE: hid_compare_usb_device(): no match on vendor ID.
  TRACE: hid_compare_usb_device(): inspecting product ID...
  TRACE: hid_compare_usb_device(): no match on product ID.
  TRACE: hid_compare_usb_device(): no custom matching function supplied.
NOTICE: hid_find_usb_device(): vendor 0x046d of USB device 002/003[0] does not match 0x05dc.
  TRACE: hid_find_usb_device(): inspecting USB device 002/001[0]...
  TRACE: hid_compare_usb_device(): comparing match specifications to USB device...
  TRACE: hid_compare_usb_device(): inspecting vendor ID...
  TRACE: hid_compare_usb_device(): no match on vendor ID.
  TRACE: hid_compare_usb_device(): inspecting product ID...
  TRACE: hid_compare_usb_device(): no match on product ID.
  TRACE: hid_compare_usb_device(): no custom matching function supplied.
NOTICE: hid_find_usb_device(): vendor 0x1d6b of USB device 002/001[0] does not match 0x05dc.
  TRACE: hid_find_usb_device(): enumerating USB devices on bus 001...
  TRACE: hid_find_usb_device(): inspecting USB device 001/004[0]...
  TRACE: hid_compare_usb_device(): comparing match specifications to USB device...
  TRACE: hid_compare_usb_device(): inspecting vendor ID...
  TRACE: hid_compare_usb_device(): match on vendor ID: 0x05dc.
  TRACE: hid_compare_usb_device(): inspecting product ID...
  TRACE: hid_compare_usb_device(): match on product ID: 0x0802.
  TRACE: hid_compare_usb_device(): no custom matching function supplied.
NOTICE: hid_find_usb_device(): found a matching USB device 001/004[0].
  TRACE: hid_force_open(): claiming USB device 001/004[0].
  TRACE: hid_os_force_claim(): failed to claim USB device 001/004[0], trying 2 more time(s)...
  TRACE: hid_os_force_claim(): detaching kernel driver from USB device 001/004[0]...
WARNING: hid_os_force_claim(): failed to detach kernel driver from USB device 001/004[0]...
WARNING: hid_force_open(): failed to claim USB device 001/004[0].
  TRACE: hid_close(): closing USB device 001/004[0]...
  TRACE: hid_close(): closing handle of USB device 001/004[0]...
NOTICE: hid_close(): successfully closed USB device 001/004[0].
  TRACE: hid_close(): freeing memory allocated for HID parser...
  TRACE: hid_close(): resetting HIDInterface...
hid_force_open failed with return code 12

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