Same here on Ubuntu 17.10 using kernel 4.15 dmesg: [ 177.004739] Bluetooth: hci0: last event is not cmd complete (0x0f) [ 180.384766] Bluetooth: hci0: SCO packet for unknown connection handle 0 [ 180.384861] Bluetooth: hci0: SCO packet for unknown connection handle 0 [ 180.384941] Bluetooth: hci0: SCO packet for unknown connection handle 0 [ 180.394738] Bluetooth: hci0: SCO packet for unknown connection handle 0 [ 180.394788] Bluetooth: hci0: SCO packet for unknown connection handle 0 [ 181.447392] Bluetooth: hci0: SCO packet for unknown connection handle 257 [ 181.447521] Bluetooth: hci0: SCO packet for unknown connection handle 257
and then later a repeated section of these: [ 857.325487] Bluetooth: hci0: link tx timeout [ 857.325530] Bluetooth: hci0: killing stalled connection 20:13:03:22:df:5e [ 859.353861] Bluetooth: hci0: command 0x041f tx timeout [ 861.369927] Bluetooth: hci0: command 0x0406 tx timeout uname -a: Linux willis-laptop 4.15.0-041500-generic #201801282230 SMP Sun Jan 28 22:31:30 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux -- 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/1430696 Title: Bluetooth audio instability: Bluetooth: hci0 SCO packet for unknown connection handle Status in linux package in Ubuntu: Confirmed Bug description: (I'm creating a new bug as instructed at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898347/comments/29) I havea Nokia BH-216 bluetooth headset. Generally it works well, but randomly (after 5-15 minutes of use) it gets disconnected. The kernel log output looks like this: [ 3272.270382] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270383] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270384] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270384] Bluetooth: hci0 SCO packet for unknown connection handle 48 [ 3272.270385] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270386] Bluetooth: hci0 SCO packet for unknown connection handle 0 With quick googling this seems to be happening to other people with other hardware and distributions so i suppose this is a BT audio bug in kernel. Bug #898347 is related. Tested on up to date Ubuntu 14.10 x86_64. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-31-generic 3.16.0-31.41 ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5 Uname: Linux 3.16.0-31-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vranki 2421 F.... pulseaudio /dev/snd/controlC1: vranki 2421 F.... pulseaudio CurrentDesktop: X-Cinnamon Date: Wed Mar 11 11:22:19 2015 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=71d76087-3fdf-4f57-a0f4-0b128be4d386 InstallationDate: Installed on 2015-02-12 (26 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: LENOVO 20C600LLMS ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-31-generic root=UUID=e114ca99-f1c7-450f-a4a5-553075d92b7c ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-31-generic N/A linux-backports-modules-3.16.0-31-generic N/A linux-firmware 1.138.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/14/2014 dmi.bios.vendor: LENOVO dmi.bios.version: J9ET96WW (2.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 20C600LLMS dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrJ9ET96WW(2.16):bd10/14/2014:svnLENOVO:pn20C600LLMS:pvrThinkPadEdgeE540:rvnLENOVO:rn20C600LLMS:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20C600LLMS dmi.product.version: ThinkPad Edge E540 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1430696/+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
