In my case I have the same issue 4.15.0-15-generic #16-Ubuntu SMP Wed Apr 4 13:58:14 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
If I type dmesg | grep -i bluetooth I get: [ 2.233539] usb 1-1.4: Product: DW375 Bluetooth Module [ 35.812010] Bluetooth: Core ver 2.22 [ 35.812026] Bluetooth: HCI device and connection manager initialized [ 35.812029] Bluetooth: HCI socket layer initialized [ 35.812032] Bluetooth: L2CAP socket layer initialized [ 35.812037] Bluetooth: SCO socket layer initialized [ 36.487377] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 36.487378] Bluetooth: BNEP filters: protocol multicast [ 36.487381] Bluetooth: BNEP socket layer initialized [ 63.484470] Bluetooth: RFCOMM TTY layer initialized [ 63.484478] Bluetooth: RFCOMM socket layer initialized [ 63.484487] Bluetooth: RFCOMM ver 1.11 [ 460.003598] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 475.007411] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 490.005426] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 505.007211] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 520.003265] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 535.006019] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 550.002996] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 565.005810] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 580.006797] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 595.005627] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 610.005595] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 625.006373] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 640.005272] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 655.006210] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 670.007190] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 685.005978] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 700.003936] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 715.005885] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 730.002791] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 736.002704] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 751.005650] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 766.002556] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 781.005387] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 796.005311] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 811.003208] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 826.004147] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 841.001988] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 856.002863] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 871.006809] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 886.005745] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 901.005710] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 916.004466] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 931.006359] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 946.002300] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 961.005133] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 976.006140] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 996.003009] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1011.001881] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1026.005811] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1041.007667] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1056.003608] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1071.005537] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1086.005406] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1101.005309] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1116.006203] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1121.023108] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1137.006058] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1152.006965] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1167.006789] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1182.003767] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1197.005699] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1212.005568] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1227.007394] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1242.006303] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1257.007178] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1272.004137] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1287.005954] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1302.003964] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1317.002796] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1332.003782] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 1347.007590] Bluetooth: hci0: last event is not cmd complete (0x0f) the last lines are only present when I type scan on at the prompt of bluethootclt However my system is not able to discover many of the bluethoot devices. I have tested against my phone and other linux laptop. So the message **IS AFFECTING** the Bluetooth functioning since the system does not connect to many of the devices. -- 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/1748565 Title: Kernel regularly logs: Bluetooth: hci0: last event is not cmd complete (0x0f) Status in Linux: Unknown Status in linux package in Ubuntu: Confirmed Bug description: Hello, dmesg: [ 3363.056494] Bluetooth: hci0: last event is not cmd complete (0x0f) Regards, -- Cristian ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-9-generic 4.15.0-9.10 ProcVersionSignature: Ubuntu 4.15.0-9.10-generic 4.15.2 Uname: Linux 4.15.0-9-generic x86_64 ApportVersion: 2.20.8-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: caravena 1811 F.... pulseaudio CurrentDesktop: ubuntu-communitheme:ubuntu:GNOME Date: Fri Feb 9 20:35:29 2018 InstallationDate: Installed on 2017-10-13 (119 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926) MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U3C/530U4C ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-9-generic root=UUID=707d0f89-4b1d-4432-9d50-6058dc4c1ee9 ro rootflags=subvol=@ quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-9-generic N/A linux-backports-modules-4.15.0-9-generic N/A linux-firmware 1.170 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.family: ChiefRiver System dmi.product.name: 530U3C/530U4C dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. 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