Since https://bugzilla.kernel.org/show_bug.cgi?id=110901 was closed, I would like to open a new bug to track the remaining issue on MacBookPro models without touchbar, where bluetooth fails to initialise without an additional patch. $ dmesg | grep Bluetooth [ 9.416324] Bluetooth: Core ver 2.22 [ 9.416343] Bluetooth: HCI device and connection manager initialized [ 9.416348] Bluetooth: HCI socket layer initialized [ 9.416350] Bluetooth: L2CAP socket layer initialized [ 9.416355] Bluetooth: SCO socket layer initialized [ 9.721375] Bluetooth: HCI UART driver ver 2.3 [ 9.721377] Bluetooth: HCI UART protocol H4 registered [ 9.721377] Bluetooth: HCI UART protocol BCSP registered [ 9.721390] Bluetooth: HCI UART protocol LL registered [ 9.721390] Bluetooth: HCI UART protocol ATH3K registered [ 9.721400] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 9.721433] Bluetooth: HCI UART protocol Intel registered [ 9.749504] Bluetooth: HCI UART protocol Broadcom registered [ 9.749517] Bluetooth: HCI UART protocol QCA registered [ 9.749518] Bluetooth: HCI UART protocol AG6XX registered [ 9.749526] Bluetooth: HCI UART protocol Marvell registered [ 11.995669] Bluetooth: hci0: command 0xfc18 tx timeout [ 12.663134] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 12.663136] Bluetooth: BNEP filters: protocol multicast [ 12.663140] Bluetooth: BNEP socket layer initialized [ 19.892179] Bluetooth: hci0: BCM: failed to write update baudrate (-110) [ 19.892196] Bluetooth: hci0: Failed to set baudrate [ 22.022193] Bluetooth: hci0: command 0x0c03 tx timeout [ 29.915576] Bluetooth: hci0: BCM: Reset failed (-110) The issue has been previously discussed at: https://github.com/Dunedan/mbp-2016-linux/issues/29 Current workarounds are either: https://github.com/lategoodbye/rpi-zero/commit/ed5900296dfb or: https://github.com/christophgysin/linux/commit/ddf622a0a19697af473051c8019fffc1eb66efe7