蓝牙无法正常工作Ubuntu 18.04 LTS

这个问题似乎很普遍，但是我尝试了前面问题中提出的所有解决方案，但都没有运气。我的蓝牙只是继续搜索设备而无法检测到它们。

输出为rfkill list：

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

输出为dmesg | grep Blue：

[    1.725292] usb 2-4: Product: Bluetooth Radio 
[   22.987302] Bluetooth: Core ver 2.22
[   22.987324] Bluetooth: HCI device and connection manager initialized
[   22.987326] Bluetooth: HCI socket layer initialized
[   22.987328] Bluetooth: L2CAP socket layer initialized
[   22.987331] Bluetooth: SCO socket layer initialized
[   24.192938] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[   24.192940] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin
[   24.262074] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[   24.279971] Bluetooth: hci0: rom_version status=0 version=1
[   24.279990] Bluetooth: hci0: cfg_sz 0, total size 22496
[   31.827382] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   31.827384] Bluetooth: BNEP filters: protocol multicast
[   31.827387] Bluetooth: BNEP socket layer initialized
[   69.606019] Bluetooth: RFCOMM TTY layer initialized
[   69.606024] Bluetooth: RFCOMM socket layer initialized
[   69.606029] Bluetooth: RFCOMM ver 1.11
[  133.549264] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  149.425182] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  165.416224] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  195.195275] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  210.934271] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  227.034314] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  242.896317] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  259.043361] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  274.227449] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  289.383402] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  305.511470] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  321.387453] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  337.520479] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  353.398532] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  369.458540] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  385.298590] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  401.410629] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  417.274763] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  433.471653] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  449.380746] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  465.528845] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  481.409819] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  497.533809] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  513.404936] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  529.532964] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  545.408026] Bluetooth: hci0: last event is not cmd complete (0x0f)

输出为lspci -knn | grep Net -A2; lsusb：

0a:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:2231]
    Kernel driver in use: rtl8723be
    Kernel modules: rtl8723be
Bus 001 Device 002: ID 8087:8001 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 0bda:b001 Realtek Semiconductor Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

在尝试了太多解决方案之后，我擦除了整个磁盘并安装了新的18.04 LTS版本（我使用的是HP 15 Notebook），但仍然存在相同的问题。

我遇到了同样的问题，发现了这一点：

“一位名叫Takashi Iwai的杰出开发人员提出了一个解决方案，该解决方案我已整合到4.15内核中

sudo apt install git build-essential dkms
git clone https://github.com/jeremyb31/newbtfix-4.15.git
sudo dkms add ./newbtfix-4.15
sudo dkms install btusb/4.0

重启”

在这里找到 ubuntu 18.04 LTS蓝牙发现无效

我必须从Synaptic手动安装git。我不知道它的作用，但是对我有用。

我部分解决了运行以下命令的问题：

sudo apt-get install build-essential git
git clone https://github.com/lwfinger/rtlwifi_new/
cd rtlwifi_new
make
sudo make install
echo "options rtl8723be fwlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf

之后，您可能会遇到WiFi连接缓慢的问题，我使用以下命令修复了该问题：

sudo modprobe -r iwlwifi sudo modprobe iwlwifi 11n_disable=1
echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf

重要信息：这不能完全解决问题，我必须关闭wifi，搜索并配对蓝牙设备，然后再次打开wifi。我不知道为什么会这样，但是谷歌搜索告诉我，ubuntu驱动程序像我的rtl8723b适配器有问题

升级系统后，我遇到了同样的问题。我在发现以下错误/var/log/dpkg.log：

2019-03-23 16:37:24 status half-configured pulseaudio-module-bluetooth:amd64 1:11.1-1ubuntu7.1
2019-03-23 16:37:24 status half-installed pulseaudio-module-bluetooth:amd64 1:11.1-1ubuntu7.1
2019-03-23 16:37:24 status config-files pulseaudio-module-bluetooth:amd64 1:11.1-1ubuntu7.1
2019-03-23 16:37:24 status config-files pulseaudio-module-bluetooth:amd64 1:11.1-1ubuntu7.1
2019-03-23 16:37:24 status config-files pulseaudio-module-bluetooth:amd64 1:11.1-1ubuntu7.1
2019-03-23 16:37:24 status not-installed pulseaudio-module-bluetooth:amd64 <none>

因此，我重新安装了该软件包，然后重新启动pulseaudio，最终解决了该问题：

sudo apt-get install --reinstall pulseaudio-module-bluetooth
pulseaudio -k
sudo alsa force-reload

我在Mint上，并在内核更新到4.15.0.33之后开始得到同样的“最后一个事件未完成cmd（0x0f）”蓝牙网络连接问题，我没有做任何修复，但是我启动到4.15.0.32，它再次工作。

因此，由于Ubuntu 18.04也使用4.15内核，很可能您遇到了相同的问题，请尝试在4.15.0.32或更低版本上启动，然后查看是否可以解决问题。