Two days ago I had a lot of updates, including ones for Bluetooth and wifi. I installed just before shutting down the computer, late in the evening.
Yesterday I could use my bluetooth headphones without problems until a restart.
From that moment on it is impossible to enable Bluetooth in the KDE settings.
I thought it was caused by the updates the day before but then realized it would be strange since I had used the headphones the whole morning, which was after the updates.
I then restored a Timeshift backup from Saturday morning, but still no Bluetooth.
The Bluetooth service ia active and running:
systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 06:17:50 CET; 9h ago
Docs: man:bluetoothd(8)
Main PID: 2942 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 4915)
CPU: 18ms
CGroup: /system.slice/bluetooth.service
└─2942 /usr/libexec/bluetooth/bluetoothd
Jan 31 06:17:50 localhost systemd[1]: Starting Bluetooth service...
Jan 31 06:17:50 localhost bluetoothd[2942]: Bluetooth daemon 5.62
Jan 31 06:17:50 localhost systemd[1]: Started Bluetooth service.
Jan 31 06:17:50 localhost bluetoothd[2942]: Starting SDP server
Jan 31 06:17:50 localhost bluetoothd[2942]: Bluetooth management interface 1.21 initialized
lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 003 Device 003: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 003 Device 002: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 046d:c069 Logitech, Inc. M-U0007 [Corded Mouse M500]
Bus 001 Device 011: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 25a7:6672 Areson Technology Corp OKLIC
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
sudo rfkill list
[sudo] password for root:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
If you haven’t already done so, please install the package “bluez-tools”.
Then execute “bt-adapter --list” to discover which adapters are present on your systems and then, execute “bt-adapter --info” to list the properties of the default adapter.
You’ll have to add “–adapter «name|mac»” if you have more than one adapter on your system.
Bus 003 Device 004: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
I guess what is missing is a driver for this device, but I see it should be supported by the kernel, see https://linux-hardware.org/index.php?id=usb:8087-0a2a
Can you check what “sudo modprobe -v btusb” is giving?
Also, you can try to turn off your machine and power off completely once (unplug the power cable), then retry. The BT error -110 is often related with an intel chip initialization problem.
My respond to him:
You are a genius. I let the laptop battery run dry until 3% at which it was shutdown automatically.
After plugging in the power cord and a cold start Bluetooth is working again. Amazing.
Thank you very much for your help. I marked this bug as resolved and Fixed.
I have a similar problem, only I have a Bluetooth USB adapter. After executing the “dmesg --follow-new” command and inserting the device, Konsole displays the following message:
132.935070] usb 1-7: new full-speed USB device number 5 using xhci_hcd
133.084669] usb 1-7: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=88.91
133.084682] usb 1-7: New USB device strings: Mfr=0, Product=2, SerialNumber=0
133.084687] usb 1-7: Product: BT DONGLE10
133.088362] Bluetooth**: hci0: CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once…**