A process that cannot be killed usually means it's blocked in a kernel call. So this sounds like a bug in the kernel Bluetooth code...
Please: 1. Run this command to gather more system info: apport-collect 1910405 2. Try a newer Ubuntu release or just a newer kernel from https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D ** Tags added: bionic ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: bluez (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1910405 Title: bluetoothd hangs and cannot be killed Status in bluez package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Bug description: Hi, When having a bluetooth headphone (JBL Live) connected using the A2DP pulseaudio sink, the output sound suddenly stops during a music streaming of videocall session. Sometimes just disconnecting and reconnecting the headphone works, but some times reconnection is not possible anymore due to the hanging of bluetoothd. Bluetoothd still appears in the processes list, but cannot be killed, neither with "sudo service bluetooth stop" or "kill -9": $ ps afx | grep blue 9597 tty2 Sl+ 0:01 | \_ gnome-control-center bluetooth 5405 ? Ss 0:00 \_ /usr/lib/bluetooth/obexd 10694 pts/0 S+ 0:00 \_ grep blue 20548 ? Ds 0:03 /usr/lib/bluetooth/bluetoothd All programs keep working normally, only bluetooth is affected as well as the bluetooth settings page. The only solution is a hard reboot. A soft reboot doesn't even work: the systems keeps trying to end the bluetoothd process so one needs to press the power button for a few seconds to terminate the process. $ bluetoothd --version 5.48 $ uname -a Linux omer 5.4.0-58-generic #64~18.04.1-Ubuntu SMP Wed Dec 9 17:11:11 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Using Ubuntu 18.04.5 LTS preinstalled on a Dell XPS13, which has been working nice for over one year now just like previous versions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1910405/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
