我在我的电脑上安装了 Kubuntu联想 G500，并且蓝牙没有显示任何设备结果。
我必须安装一个 bios 更新（3 到 4 天前），所以我连接了一个 Windows 10 闪存驱动器（这样我就可以执行一个 .exe 文件..）并且在途中，在 Windows 10 上测试了蓝牙 - 它成功了！
更新 BIOS 后，我进入 Kubuntu，蓝牙曾是列出可用的设备！我连接到耳机并保存了连接，是的 - 我不知道它是如何工作的。
因此，我决定今天再次连接我的耳机，尽管之前的连接已保存并列出，但却无法连接。
我决定搜索设备，但再次发现没有列出蓝牙设备。
请帮忙。
devwal@devwal-Len:~$ lsusb
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 005: ID 105b:e065 Foxconn International, Inc. BCM43142A0 Bluetooth module
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 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 002: ID 174f:114f Syntek
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
devwal@devwal-Len:~$ sudo lshw -class communication
*-communication
description: Communication controller
product: 7 Series/C216 Chipset Family MEI Controller #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:29 memory:e0614000-e061400f
devwal@devwal-Len:~$ dmesg | grep Blue
[ 21.464168] Bluetooth: Core ver 2.22
[ 21.464188] Bluetooth: HCI device and connection manager initialized
[ 21.464192] Bluetooth: HCI socket layer initialized
[ 21.464193] Bluetooth: L2CAP socket layer initialized
[ 21.464196] Bluetooth: SCO socket layer initialized
[ 21.897774] Bluetooth: hci0: BCM: chip id 70
[ 21.898742] Bluetooth: hci0: BCM: features 0x06
[ 21.914795] Bluetooth: hci0: devwal-Len
[ 21.915784] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000
[ 21.943711] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-105b-e065.hcd not found
[ 35.960290] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 35.960293] Bluetooth: BNEP filters: protocol multicast
[ 35.960300] Bluetooth: BNEP socket layer initialized
[ 107.175892] Bluetooth: RFCOMM TTY layer initialized
[ 107.175917] Bluetooth: RFCOMM socket layer initialized
[ 107.175930] Bluetooth: RFCOMM ver 1.11
[ 879.416301] Bluetooth: hci0: BCM: chip id 70
[ 879.417321] Bluetooth: hci0: BCM: features 0x06
[ 879.433325] Bluetooth: hci0: devwal-Len
[ 879.434316] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000
[ 879.434357] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-105b-e065.hcd not found
[ 881.464758] Bluetooth: hci0: command 0x1003 tx timeout
[ 881.466334] Bluetooth: hci0: unexpected event for opcode 0x1003
devwal@devwal-Len:~/Desktop$ service bluetooth status
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2020-04-07 16:42:05 IDT; 28min ago
Docs: man:bluetoothd(8)
Main PID: 1018 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 4915)
CGroup: /system.slice/bluetooth.service
└─1018 /usr/lib/bluetooth/bluetoothd
Apr 07 16:42:05 devwal-Len systemd[1]: Started Bluetooth service.
Apr 07 16:42:06 devwal-Len bluetoothd[1018]: Bluetooth management interface 1.14 initialized
Apr 07 16:42:09 devwal-Len bluetoothd[1018]: Loading LTKs timed out for hci0
Apr 07 16:48:09 devwal-Len bluetoothd[1018]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSource
Apr 07 16:48:09 devwal-Len bluetoothd[1018]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSink
Apr 07 16:49:10 devwal-Len bluetoothd[1018]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/A2DPSource
Apr 07 16:49:10 devwal-Len bluetoothd[1018]: Endpoint unregistered: sender=:1.59 path=/MediaEndpoint/A2DPSink
Apr 07 16:49:13 devwal-Len bluetoothd[1018]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSource
Apr 07 16:49:13 devwal-Len bluetoothd[1018]: Endpoint registered: sender=:1.59 path=/MediaEndpoint/A2DPSink
Apr 07 17:07:01 devwal-Len bluetoothd[1018]: connect error: Host is down (112)
devwal@devwal-Len:~/Desktop$ dmesg | grep -i bluetooth # Shows all Bluetooth driver info
[ 22.016491] Bluetooth: Core ver 2.22
[ 22.016507] Bluetooth: HCI device and connection manager initialized
[ 22.016510] Bluetooth: HCI socket layer initialized
[ 22.016512] Bluetooth: L2CAP socket layer initialized
[ 22.016514] Bluetooth: SCO socket layer initialized
[ 22.318157] Bluetooth: hci0: BCM: chip id 70
[ 22.319109] Bluetooth: hci0: BCM: features 0x06
[ 22.335161] Bluetooth: hci0: devwal-Len
[ 22.339297] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000
[ 22.562555] bluetooth hci0: Direct firmware load for brcm/BCM43142A0-105b-e065.hcd failed with error -2
[ 22.562560] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-105b-e065.hcd not found
[ 32.625596] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 32.625597] Bluetooth: BNEP filters: protocol multicast
[ 32.625610] Bluetooth: BNEP socket layer initialized
[ 36.235673] Bluetooth: hci0: command 0x1003 tx timeout
[ 36.237390] Bluetooth: hci0: unexpected event for opcode 0x1003
[ 396.299491] Bluetooth: RFCOMM TTY layer initialized
[ 396.299501] Bluetooth: RFCOMM socket layer initialized
[ 396.299514] Bluetooth: RFCOMM ver 1.11
[ 457.377448] Bluetooth: hci0: BCM: chip id 70
[ 457.378461] Bluetooth: hci0: BCM: features 0x06
[ 457.394452] Bluetooth: hci0: devwal-Len
[ 457.395447] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000
[ 457.395470] bluetooth hci0: Direct firmware load for brcm/BCM43142A0-105b-e065.hcd failed with error -2
[ 457.395473] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-105b-e065.hcd not found
[ 459.403604] Bluetooth: hci0: command 0x1003 tx timeout
[ 459.404439] Bluetooth: hci0: unexpected event for opcode 0x1003
devwal@devwal-Len:/lib/firmware/brcm$ ls
bcm4329-fullmac-4.bin brcmfmac43236b.bin brcmfmac4329-sdio.bin brcmfmac43362-sdio.bin brcmfmac4350c2-pcie.bin brcmfmac4356-sdio.bin brcmfmac4366b-pcie.bin
bcm43xx-0.fw brcmfmac43241b0-sdio.bin brcmfmac4330-sdio.bin brcmfmac4339-sdio.bin brcmfmac4350-pcie.bin brcmfmac43570-pcie.bin brcmfmac4366c-pcie.bin
bcm43xx_hdr-0.fw brcmfmac43241b4-sdio.bin brcmfmac43340-sdio.bin brcmfmac43430a0-sdio.bin brcmfmac4354-sdio.bin brcmfmac4358-pcie.bin brcmfmac4371-pcie.bin
brcmfmac43143.bin brcmfmac43241b5-sdio.bin brcmfmac4334-sdio.bin brcmfmac43430-sdio.bin brcmfmac43569.bin brcmfmac43602-pcie.ap.bin brcmfmac4373.bin
brcmfmac43143-sdio.bin brcmfmac43242a.bin brcmfmac4335-sdio.bin brcmfmac43455-sdio.bin brcmfmac4356-pcie.bin brcmfmac43602-pcie.bin brcmfmac4373-sdio.bin
据我所知，我的键盘上没有“蓝牙开/关”按钮。大多数帖子都提到了 F5，但对于我的电脑来说，它是一个刷新键。
好像我有
Foxconn International, Inc. BCM43142A0 Bluetooth module蓝牙，但我无法在任何地方找到它的安装。我尝试了一些操作，例如禁用和启用蓝牙。
我尝试重置蓝牙
sudo service bluetooth restart并systemctl restart bluetooth.service
并且也做了这个：
devwal@devwal-Len:~$ sudo rfkill list
[sudo] password for devwal:
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
5: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
devwal@devwal-Len:~$ sudo rfkill unblock bluetooth
devwal@devwal-Len:~$ sudo service bluetooth start
以上方法均未解决问题。
答案1
哦，经过几个小时的谷歌搜索，我找到了解决此类问题的最佳方法 - 该命令的输出之一dmesg | grep -i bluetooth
是：
[22.562560] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-105b-e065.hcd not found
该文件在目录中不存在：/lib/firmware/brcm
从以下位置下载缺失的文件这里。
重新启动机器。
并且蓝牙应该可以启动并运行！
来源：https://github.com/winterheart/broadcom-bt-firmware
PS：我尝试了以下解决方案：https://github.com/jeremyb31/newbtfix-4.15它搞坏了我的 wifi。不推荐。