Hi,
I have a bluetooth keyboard that I use for my laptop, which runs Kubuntu 19.04. I noticed though, that a short while after connecting the keyboard, the CPU fan goes on and one of the threads is at 100%. If I open a terminal and type "top", it shows that a process called bluetoothd is taking 12% of the CPU power which is a full thread (100/8=12.5). I'm not sure what it's doing, but it doesn't require that much CPU power to work. If I end the process and restart it, the keyboard works fine and the CPU is calm until it happens again (about 20 minutes later). I reinstalled bluez and even tried recompiling from source, but the problem persists.
My specs:
Version of bluetoothd: 5.50
Linux Kernel: 5.3.0-46-generic
KDE Plasma Version 5.16.5
Thank you,
Isaac Cohen
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu8.8
Architecture: amd64
CurrentDesktop: KDE
DistroRelease: Ubuntu 19.10
InstallationDate: Installed on 2019-12-15 (115 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
InterestingModules: rfcomm bnep btusb bluetooth
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0c45:671e Microdia Integrated_Webcam_HD
Bus 001 Device 002: ID 27c6:5301 HTMicroelectronics Goodix Fingerprint Device
Bus 001 Device 004: ID 0cf3:e009 Qualcomm Atheros Communications
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. Inspiron 3583
Package: bluez 5.50-0ubuntu5.1 [modified: lib/systemd/system/bluetooth.service lib/udev/hid2hci lib/udev/rules.d/97-hid2hci.rules]
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-46-generic root=UUID=dad855bd-aa2f-4675-a8a6-6fa960525f41 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18
Tags: eoan
Uname: Linux 5.3.0-46-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 05/30/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.5.1
dmi.board.name: 0WHCP7
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.5.1:bd05/30/2019:svnDellInc.:pnInspiron3583:pvr:rvnDellInc.:rn0WHCP7:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3583
dmi.product.sku: 08CA
dmi.sys.vendor: Dell Inc.
hciconfig:
hci0: Type: Primary Bus: USB
BD Address: AC:D5:64:CC:54:D6 ACL MTU: 1024:8 SCO MTU: 50:8
UP RUNNING PSCAN ISCAN
RX bytes:47194 acl:2390 sco:0 events:266 errors:0
TX bytes:3046 acl:50 sco:0 commands:163 errors:0
mtime.conffile..etc.dbus-1.system.d.bluetooth.conf: 2020-04-07T16:35:14.446062
Thank you for your bug report. Could you add your 'journalctl -b 0' from a session having the issue?
Could you also do 'apport-collect 1871695' to include debug logs to the report?