我在 Dell Inspiron 3470 上安装了 Ubuntu 20.04，但它无法识别蓝牙。Dell 页面上的硬件规格：389-BEHN：802.11bgn + 蓝牙 4.0、2.4 GHz、1x1。
当我打开设置时，它显示：未找到蓝牙。插入适配器即可使用蓝牙。
我努力了：
sudo blueman-manager
blueman-manager version 2.1.2 starting
blueman-manager 16.22.15 ERROR Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
blueman-manager 16.22.15 ERROR Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting
没有可供下载的其他驱动程序。
附加信息：
sudo lshw | grep -A 10 "blue"
capabilities: bluetooth usb-1.10
configuration: maxpower=100mA speed=12Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 5.4.0-40-generic xhci-hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 5.04
capabilities: usb-3.10
configuration: driver=hub slots=8 speed=10000Mbit/s
。
dmesg |egrep -i "blue|fw|firm|hci"
[ 0.000000] [Firmware Bug]: TPM Final Events table missing or invalid
[ 0.522136] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.522138] ehci-pci: EHCI PCI platform driver
[ 0.522145] ehci-platform: EHCI generic platform driver
[ 0.522152] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.522153] ohci-pci: OHCI PCI platform driver
[ 0.522159] ohci-platform: OHCI generic platform driver
[ 0.522163] uhci_hcd: USB Universal Host Controller Interface driver
[ 0.522362] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 0.522367] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
[ 0.523468] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x110 quirks 0x0000000000009810
[ 0.523475] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
[ 0.523659] usb usb1: Product: xHCI Host Controller
[ 0.523660] usb usb1: Manufacturer: Linux 5.4.0-40-generic xhci-hcd
[ 0.525174] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 0.525177] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
[ 0.525178] xhci_hcd 0000:00:14.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 0.525206] usb usb2: Product: xHCI Host Controller
[ 0.525207] usb usb2: Manufacturer: Linux 5.4.0-40-generic xhci-hcd
[ 0.813299] ahci 0000:00:17.0: version 3.0
[ 0.827290] ahci 0000:00:17.0: AHCI 0001.0301 32 slots 6 ports 6 Gbps 0xf impl SATA mode
[ 0.827291] ahci 0000:00:17.0: flags: 64bit ncq sntf pm clo only pio slum part ems deso sadm sds apst
[ 0.859458] usb 1-5: new full-speed USB device number 2 using xhci_hcd
[ 0.864068] scsi host0: ahci
[ 0.864329] scsi host1: ahci
[ 0.864538] scsi host2: ahci
[ 0.864744] scsi host3: ahci
[ 0.864851] scsi host4: ahci
[ 0.864950] scsi host5: ahci
[ 1.139466] usb 1-8: new high-speed USB device number 3 using xhci_hcd
[ 1.415443] usb 1-14: new full-speed USB device number 4 using xhci_hcd
[ 9.413222] Bluetooth: Core ver 2.22
[ 9.413232] Bluetooth: HCI device and connection manager initialized
[ 9.413234] Bluetooth: HCI socket layer initialized
[ 9.413235] Bluetooth: L2CAP socket layer initialized
[ 9.413237] Bluetooth: SCO socket layer initialized
[ 9.502605] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[ 46.970961] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 46.970964] Bluetooth: BNEP filters: protocol multicast
[ 46.970972] Bluetooth: BNEP socket layer initialized
[ 191.667475] Lockdown: fwupd: /dev/mem,kmem,port is restricted; see man kernel_lockdown.7
。
dmesg | grep Bluetooth ✔ │ 09:50:21
[ 9.413222] Bluetooth: Core ver 2.22
[ 9.413232] Bluetooth: HCI device and connection manager initialized
[ 9.413234] Bluetooth: HCI socket layer initialized
[ 9.413235] Bluetooth: L2CAP socket layer initialized
[ 9.413237] Bluetooth: SCO socket layer initialized
[ 46.970961] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 46.970964] Bluetooth: BNEP filters: protocol multicast
[ 46.970972] Bluetooth: BNEP socket layer initialized
下面的命令不返回任何内容：
sudo lspci | grep -A 10 "blue"
。
ls /sys/bus/sdio/drivers