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18.04 LTS 中关闭蓝牙后如何重新打开？

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18.04 LTS 中关闭蓝牙后如何重新打开？

我最近在 Dell XPS PC 上安装了 Ubuntu 18.04 和 Windows 10。最初在 Ubuntu 上，蓝牙工作正常。出于某种原因，我使用设置 UI 中的开关禁用了蓝牙，然后重新启动 Windows 10，发现两个操作系统中的蓝牙都消失了。完全关闭并重新启动 PC 后，我可以在 Windows 中再次使用蓝牙。但在 Ubuntu 中，“启用蓝牙”开关仍然是灰色的，并且消息显示

未找到蓝牙

插入加密狗即可使用蓝牙

我试过了：

  • 安装最新和以前的内核，但没有帮助。
  • 还尝试过其他绕过方法，但是都失败了。

结果rfkill list：

> rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

lspci 的结果：

lspci
00:00.0 Host bridge: Intel Corporation Device 3ec2 (rev 07)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 07)
00:02.0 Display controller: Intel Corporation Device 3e92
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation 200 Series PCH USB 3.0 xHCI Controller
00:15.0 Signal processing controller: Intel Corporation 200 Series PCH Serial IO I2C Controller #0
00:15.1 Signal processing controller: Intel Corporation 200 Series PCH Serial IO I2C Controller #1
00:16.0 Communication controller: Intel Corporation 200 Series PCH CSME HECI #1
00:17.0 SATA controller: Intel Corporation 200 Series PCH SATA controller [AHCI mode]
00:1c.0 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #2 (rev f0)
00:1c.2 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #3 (rev f0)
00:1c.3 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #4 (rev f0)
00:1c.4 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #5 (rev f0)
00:1d.0 PCI bridge: Intel Corporation 200 Series PCH PCI Express Root Port #9 (rev f0)
00:1e.0 Signal processing controller: Intel Corporation 200 Series PCH Serial IO UART Controller #0
00:1f.0 ISA bridge: Intel Corporation Device a2c9
00:1f.2 Memory controller: Intel Corporation 200 Series PCH PMC
00:1f.3 Audio device: Intel Corporation 200 Series PCH HD Audio
00:1f.4 SMBus: Intel Corporation 200 Series PCH SMBus Controller
01:00.0 VGA compatible controller: NVIDIA Corporation GP104 (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller (rev a1)
02:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller
03:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 31)
04:00.0 Ethernet controller: Qualcomm Atheros Killer E2400 Gigabit Ethernet Controller (rev 10)
70:00.0 Non-Volatile memory controller: Toshiba America Info Systems Device 0116

我如何打开蓝牙？

更新：输出lsusb

[deleted]

答案1

我通过愚蠢地重新安装 Ubuntu 来“修复”该问题。

PS：从 USB PE 启动时，蓝牙配置显示正确。这似乎是一个软件错误，在某些情况下禁用蓝牙后，您将无法再次启用它。

答案2

似乎不需要重新安装。我只是从 USB 重新启动，打开蓝牙系统设置，找到设备

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