same, very annoying Thinkpad T440, with Linux Mint 18.1 Cinnamon (based on Ubuntu 16.04) and a Logitech K380 bluetooth keyboard
lsb_release -rd Description: Linux Mint 18.1 Serena Release: 18.1 uname -a Linux xochiquetzal 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux the error, 2x (note it seems to reconnecct the device with a different number): [71585.431481] usb 2-7: USB disconnect, device number 12 [71585.902507] usb 2-7: new full-speed USB device number 14 using xhci_hcd [71586.032157] usb 2-7: New USB device found, idVendor=8087, idProduct=07dc [71586.032166] usb 2-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [71586.046505] Bluetooth: hci0: read Intel version: 370710018002030d55 [71586.046510] Bluetooth: hci0: Intel device is already patched. patch num: 55 [71594.739976] hid-generic 0005:046D:B342.0009: unknown main item tag 0x0 [71594.740229] input: Keyboard K380 as /devices/pci0000:00/0000:00:14.0/usb2/2-7/2-7:1.0/bluetooth/hci0/hci0:256/0005:046D:B342.0009/input/input25 [71594.740774] hid-generic 0005:046D:B342.0009: input,hidraw2: BLUETOOTH HID v42.00 Keyboard [Keyboard K380] on 5c:c5:d4:04:83:db [71922.708526] usb 2-7: USB disconnect, device number 14 [71923.127502] usb 2-7: new full-speed USB device number 16 using xhci_hcd [71923.256785] usb 2-7: New USB device found, idVendor=8087, idProduct=07dc [71923.256790] usb 2-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [71923.271836] Bluetooth: hci0: read Intel version: 370710018002030d55 [71923.271838] Bluetooth: hci0: Intel device is already patched. patch num: 55 [71930.531386] hid-generic 0005:046D:B342.000A: unknown main item tag 0x0 [71930.531558] input: Keyboard K380 as /devices/pci0000:00/0000:00:14.0/usb2/2-7/2-7:1.0/bluetooth/hci0/hci0:256/0005:046D:B342.000A/input/input26 [71930.532179] hid-generic 0005:046D:B342.000A: input,hidraw2: BLUETOOTH HID v42.00 Keyboard [Keyboard K380] on 5c:c5:d4:04:83:db -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1385113 Title: hid-generic 0005:099A:0500.0001: unknown main item tag 0x0 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1385113/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs