Originally posted by PFL
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root@HS4PiV5:~# sudo hciconfig hci0 reset
Can't get device info: No such device
root@HS4PiV5:~# sudo invoke-rc.d bluetooth restart
root@HS4PiV5:~# sudo systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2022-02-15 20:30:24 UTC; 19s ago
Docs: man:bluetoothd(8)
Main PID: 1070 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 4915)
CGroup: /system.slice/bluetooth.service
└─1070 /usr/lib/bluetooth/bluetoothd
Feb 15 20:30:24 HS4PiV5 systemd[1]: Starting Bluetooth service...
Feb 15 20:30:24 HS4PiV5 bluetoothd[1070]: Bluetooth daemon 5.50
Feb 15 20:30:24 HS4PiV5 systemd[1]: Started Bluetooth service.
Feb 15 20:30:24 HS4PiV5 bluetoothd[1070]: Starting SDP server
Feb 15 20:30:24 HS4PiV5 bluetoothd[1070]: Bluetooth management interface 1.18 initialized
root@HS4PiV5:~# hcitool dev
I also see this error
sudo systemctl start hciuart.service
Job for hciuart.service failed because the control process exited with error code.
See "systemctl status hciuart.service" and "journalctl -xe" for details.
root@HS4PiV5:~# systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
Loaded: loaded (/lib/systemd/system/hciuart.service; disabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2022-02-15 20:38:21 UTC; 1min 3s ago
Process: 1214 ExecStart=/usr/bin/btuart (code=exited, status=1/FAILURE)
Feb 15 20:38:15 HS4PiV5 systemd[1]: Starting Configure Bluetooth Modems connected by UART...
Feb 15 20:38:21 HS4PiV5 btuart[1214]: Can't set line discipline: Invalid argument
Feb 15 20:38:21 HS4PiV5 btuart[1214]: Can't initialize device: Invalid argument
Feb 15 20:38:21 HS4PiV5 btuart[1214]: bcm43xx_init
Feb 15 20:38:21 HS4PiV5 btuart[1214]: Flash firmware /lib/firmware/brcm/BCM4345C0.hcd
Feb 15 20:38:21 HS4PiV5 btuart[1214]: Set Controller UART speed to 460800 bit/s
Feb 15 20:38:21 HS4PiV5 systemd[1]: hciuart.service: Control process exited, code=exited, status=1/FAILURE
Feb 15 20:38:21 HS4PiV5 systemd[1]: hciuart.service: Failed with result 'exit-code'.
Feb 15 20:38:21 HS4PiV5 systemd[1]: Failed to start Configure Bluetooth Modems connected by UART.
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