I am receiving a similar error with my Microsoft Surface bluetooth mouse after upgrading to the latest kernel. You check the details in my comment on the Kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204765#c10
** Bug watch added: Linux Kernel Bug Tracker #204765 https://bugzilla.kernel.org/show_bug.cgi?id=204765 -- 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/1872122 Title: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] [8086:9df0] (rev 30) Subsystem [8086:0034] Kernel 4.19+: Bluetooth not working; Ubuntu 20.04 Status in linux package in Ubuntu: Invalid Bug description: New bug report for kernel: After testing Ubuntu 20.04 on my Intel NUC (NUC8i3BEH) I found out, that Bluetooth (LE) [hardware: Intel Wireless-AC 9560] isn't working; hcitool lescan reports: hcitool lescan Set scan parameters failed: Input/output error When the error occurs, btmon is reporting: > HCI Event: Command Complete (0x0e) plen 4 #4 [hci0] 20:22:26.130058 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Command Disallowed (0x0c) Beside the following error messages, there are no clues in the syslog concerning the error as far as I can tell: [ 138.152718] debugfs: File 'le_min_key_size' in directory 'hci0' already present! [ 138.152722] debugfs: File 'le_max_key_size' in directory 'hci0' already present! After testing the Ubuntu kernels I found out that this Bluetooth LE scanning works just fine with Kernel 4.15 (Ubuntu 18.04 up to date standard kernel) and Kernel 4.18 (Ubuntu 18.04.1 HWE EOL kernel). The problem starts from kernel version 5.0 (Ubuntu 18.04.2 HWE kernel) and is reproducible with the current Ubuntu 20.04 standard kernel. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu26 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lightdm 5081 F.... pulseaudio CasperMD5CheckResult: skip DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-01 (8 days ago) InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Beta amd64 (20200331) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0463:ffff MGE UPS Systems UPS Bus 001 Device 002: ID 0658:0200 Sigma Designs, Inc. Aeotec Z-Stick Gen5 (ZW090) - UZB Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Intel(R) Client Systems NUC8i3BEH Package: linux (not installed) ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=/dev/mapper/vgcs2ubct-root ro ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.4.0-21-generic N/A linux-backports-modules-5.4.0-21-generic N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.4.0-21-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 03/09/2020 dmi.bios.vendor: Intel Corp. dmi.bios.version: BECFL357.86A.0078.2020.0309.1538 dmi.board.name: NUC8BEB dmi.board.vendor: Intel Corporation dmi.board.version: J72693-306 dmi.chassis.type: 35 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 2.0 dmi.modalias: dmi:bvnIntelCorp.:bvrBECFL357.86A.0078.2020.0309.1538:bd03/09/2020:svnIntel(R)ClientSystems:pnNUC8i3BEH:pvrJ72753-305:rvnIntelCorporation:rnNUC8BEB:rvrJ72693-306:cvnIntelCorporation:ct35:cvr2.0: dmi.product.family: Intel NUC dmi.product.name: NUC8i3BEH dmi.product.sku: BOXNUC8i3BEH dmi.product.version: J72753-305 dmi.sys.vendor: Intel(R) Client Systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872122/+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
