My Bluetooth stopped turning on using the switch shown here, possibly after an update was installed for my Ubuntu 22.04 system.
The only way to get it working again is to run the commands:
sudo rmmod btusb
sleep 1
sudo modprobe btusb
What is the underlying problem? Is there a real fix for this? Otherwise I have to run these commands whenever the machine is restarted.
Some system statuses when there's problem enabling Bluetooth
$ sudo dmesg | grep -i bluetooth
[ 4.487740] Bluetooth: Core ver 2.22
[ 4.487800] NET: Registered PF_BLUETOOTH protocol family
[ 4.487802] Bluetooth: HCI device and connection manager initialized
[ 4.487816] Bluetooth: HCI socket layer initialized
[ 4.487819] Bluetooth: L2CAP socket layer initialized
[ 4.487827] Bluetooth: SCO socket layer initialized
[ 6.628034] Bluetooth: hci0: Reading Intel version command failed (-110)
[ 10.809354] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 10.809357] Bluetooth: BNEP filters: protocol multicast
[ 10.809359] Bluetooth: BNEP socket layer initialized
$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2023-08-05 17:15:01 EDT; 2min 54s ago
Docs: man:bluetoothd(8)
Main PID: 51746 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 154392)
Memory: 688.0K
CPU: 78ms
CGroup: /system.slice/bluetooth.service
└─51746 /usr/lib/bluetooth/bluetoothd
Aug 05 17:15:01 z-pc systemd[1]: Starting Bluetooth service...
Aug 05 17:15:01 z-pc bluetoothd[51746]: Bluetooth daemon 5.64
Aug 05 17:15:01 z-pc systemd[1]: Started Bluetooth service.
Aug 05 17:15:01 z-pc bluetoothd[51746]: Starting SDP server
Aug 05 17:15:01 z-pc bluetoothd[51746]: Bluetooth management interface 1.22 initialized
$ sudo rfkill
ID TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
1 wlan phy0 unblocked unblocked
