On an OrangePi-5b, `apt-get update` a few days ago updated the kernel, and now bluetooth no longer works.  What's the proper way to downgrade the kernel to whatever I had before? (armbian-config shows way too many options)? Better yet, get it working again?

bluetoothctl does not see the controller at all, and dmesg gives the following:

 

$ dmesg|grep -i bluetoo
[    2.796188] Bluetooth: Core ver 2.22
[    2.796203] NET: Registered PF_BLUETOOTH protocol family
[    2.796206] Bluetooth: HCI device and connection manager initialized
[    2.796211] Bluetooth: HCI socket layer initialized
[    2.796214] Bluetooth: L2CAP socket layer initialized
[    2.796220] Bluetooth: SCO socket layer initialized
[    3.925419] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: uart_rts_gpios = 122.
[    3.925433] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,reset_gpio = 102.
[    3.925438] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,wake_gpio = 22.
[    3.925590] input: bt-powerkey as /devices/platform/wireless-bluetooth/input/input5
[   23.055720] Bluetooth: HCI UART driver ver 2.3
[   23.055728] Bluetooth: HCI UART protocol H4 registered
[   23.055730] Bluetooth: HCI UART protocol BCSP registered
[   23.055731] Bluetooth: HCI UART protocol ATH3K registered
[   23.055769] Bluetooth: HCI UART protocol Three-wire (H5) registered
[   23.055873] Bluetooth: HCI UART protocol Intel registered
[   23.055911] Bluetooth: HCI UART protocol Broadcom registered
[   23.055921] Bluetooth: HCI UART protocol QCA registered
[   23.055922] Bluetooth: HCI UART protocol AG6XX registered
[   23.057998] Bluetooth: hci0: sending frame failed (-49)
[   23.058029] Bluetooth: hci0: Opcode 0x1003 failed: -49
[   23.177045] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   23.177063] Bluetooth: BNEP filters: protocol multicast
[   23.177077] Bluetooth: BNEP socket layer initialized

 

Edited June 7, 20251 yr by Thomm

sudo armbian-config