I just bought a Sony Bluetooth headset and connected the dongle to my Ubuntu 20.04 machine. The dongle is seen on lsusb:
Bus 006 Device 002: ID 174c:5316 ASMedia Technology Inc. ASMT1153e
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
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 005: ID 054c:0e53 Sony Corp. INZONE H9 / INZONE H7
Bus 001 Device 003: ID 1b1c:1b3a Corsair Corsair Gaming K70 RAPIDFIRE Keyboard
Bus 001 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Fourth line from bottom : Sony Corp. INZONE H9 / INZONE H7
I also did the steps described in most guides :
$ sudo modprobe btusb
$ sudo rmmod btusb
$ rfkill unblock bluetooth
$ sudo systemctl enable bluetooth
$ sudo systemctl start bluetooth.service
As a result, the service is on and appears ok:
$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2022-12-29 14:22:15 IST; 5s ago
Docs: man:bluetoothd(8)
Main PID: 6432 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 77017)
Memory: 2.3M
CGroup: /system.slice/bluetooth.service
└─6432 /usr/lib/bluetooth/bluetoothd
Dec 29 14:22:14 Onan01 systemd[1]: Starting Bluetooth service...
Dec 29 14:22:15 Onan01 bluetoothd[6432]: Bluetooth daemon 5.53
Dec 29 14:22:15 Onan01 systemd[1]: Started Bluetooth service.
Dec 29 14:22:15 Onan01 bluetoothd[6432]: Starting SDP server
Dec 29 14:22:15 Onan01 bluetoothd[6432]: Bluetooth management interface 1.14 initialized
However, I still don't see my Bluetooth dongle either on the settings GUI nor on bluetoothctl:
$ bluetoothctl list
$ bluetoothctl power on
No default controller available
One weird thing I noticed is that while one guide (here) says a cold restart is required, every time I restart (cold or warm), I have to redo the following steps:
$ sudo modprobe btusb
$ sudo rmmod btusb
$ rfkill unblock bluetooth
$ sudo systemctl enable bluetooth
$ sudo systemctl start bluetooth.service
Apparently, none of these setting changes seem to stick. After a restart, the bluetooth service is off and the btusb module is not loaded.
On dmesg, I saw the following, which could be the beginning of an explanation?
$ dmesg | grep bt
[ 98.978225] usbcore: registered new interface driver btusb
[ 101.889983] usbcore: deregistering interface driver btusb
Why the F*** is the btusb module being "deregistered" at startup? No idea. I am at a loss here. Any help would be great.
