Ubuntu 中未检测到内置麦克风

Question

我买了一台新笔记本电脑并安装了 Ubuntu。在 Windows 10 中，麦克风正常工作，但在 Ubuntu 中却不工作。

我在论坛上寻找解决方案，安装pavucontrol并尝试打开左前麦克风 0，但没有任何反应。问题是，在“输入设备”中我只能找到模拟输入，而找不到麦克风。

alsamixer显示：

aplay-l

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

lspci -v | grep Audio

00:1f.3 Multimedia audio controller: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
    Subsystem: Acer Incorporated [ALI] Sunrise Point-LP HD Audio

sudo lshw -c sound

*-usb:2                   
       description: Video
       product: HD WebCam
       vendor: Generic
       physical id: 7
       bus info: usb@1:7
       version: 96.18
       serial: 200901010001
       capabilities: usb-2.00
       configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
  *-multimedia
       description: Multimedia audio controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 1f.3
       bus info: pci@0000:00:1f.3
       version: 21
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list
       configuration: driver=snd_hda_intel latency=32
       resources: irq:129 memory:b1128000-b112bfff memory:b1100000-b110ffff

也可以看看关于我的 alsa 的更多信息。