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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1385113 Title: hid-generic 0005:099A:0500.0001: unknown main item tag 0x0 Status in Linux: Unknown Status in linux package in Ubuntu: Incomplete Bug description: Message with Mouse Bluetooth [ 32.960478] hid-generic 0005:099A:0500.0001: unknown main item tag 0x0 ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-23-generic 3.16.0-23.31 ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4 Uname: Linux 3.16.0-23-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: caravena 3344 F.... pulseaudio CurrentDesktop: GNOME Date: Fri Oct 24 05:22:54 2014 HibernationDevice: RESUME=UUID=360bd2d2-4f44-4311-86d6-4781ac81ee87 InstallationDate: Installed on 2014-09-25 (29 days ago) InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140923) MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U3C/530U4C ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.16.0-23-generic root=UUID=0fb75fae-baa3-428b-ace4-498e69ff7fb6 ro rootflags=subvol=@ quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-23-generic N/A linux-backports-modules-3.16.0-23-generic N/A linux-firmware 1.138 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/15/2013 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: P14AAJ dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: SAMSUNG_NP1234567890 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP14AAJ:bd04/15/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn530U3C/530U4C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 530U3C/530U4C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1385113/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp