这里这是正在发生事情的视频。
每次我将输入设置为“后置麦克风”时，它都会返回到“数字输入 (S/PDIF)”（只需关闭窗口，甚至无需重新启动或注销）。这只发生在输入选项卡上，因为输出工作正常。如果我运行，以下pactl list sources是我在打开窗口时得到的结果：
Source #13
State: RUNNING
Name: alsa_input.pci-0000_00_1b.0.analog-stereo
Description: Built-in Audio Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 6
Mute: no
Volume: 0: 98% 1: 98%
0: -0,61 dB 1: -0,61 dB
balance 0,00
Base Volume: 10%
-60,00 dB
Monitor of Sink: n/a
Latency: 2693 usec, configured 20000 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC888 Analog"
alsa.id = "ALC888 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA Intel MID"
alsa.long_card_name = "HDA Intel MID at 0xfbff8000 irq 46"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1b.0"
sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "3b56"
device.product.name = "5 Series/3400 Series Chipset High Definition Audio"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "32768"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "Built-in Audio Analog Stereo"
alsa.mixer_name = "Realtek ALC888"
alsa.components = "HDA:10ec0888,1458a002,00100001"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
Ports:
analog-input-microphone-front: Front Microphone (priority: 8500, not available)
analog-input-microphone-rear: Rear Microphone (priority: 8200, available)
analog-input-linein: Line In (priority: 8100, available)
Active Port: analog-input-microphone-rear
Formats:
pcm
这是我关闭窗口后得到的结果：
Source #8
State: RUNNING
Name: alsa_input.pci-0000_00_1b.0.iec958-stereo
Description: Built-in Audio Digital Stereo (IEC958)
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 6
Mute: no
Volume: 0: 40% 1: 40%
0: -23,88 dB 1: -23,88 dB
balance 0,00
Base Volume: 100%
0,00 dB
Monitor of Sink: n/a
Latency: 0 usec, configured 36000 usec
Flags: HARDWARE DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC888 Digital"
alsa.id = "ALC888 Digital"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "1"
alsa.card = "0"
alsa.card_name = "HDA Intel MID"
alsa.long_card_name = "HDA Intel MID at 0xfbff8000 irq 46"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1b.0"
sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "3b56"
device.product.name = "5 Series/3400 Series Chipset High Definition Audio"
device.form_factor = "internal"
device.string = "iec958:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "32768"
device.access_mode = "mmap+timer"
device.profile.name = "iec958-stereo"
device.profile.description = "Digital Stereo (IEC958)"
device.description = "Built-in Audio Digital Stereo (IEC958)"
alsa.mixer_name = "Realtek ALC888"
alsa.components = "HDA:10ec0888,1458a002,00100001"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
Ports:
iec958-stereo-input: Digital Input (S/PDIF) (priority: 0)
Active Port: iec958-stereo-input
Formats:
pcm
我遇到了音频问题，因此我运行了这些命令，但可能搞砸了一些东西：
sudo apt-get install alsa-tools-gui
sudo apt-get remove pulseaudio
sudo apt-get remove pulseaudio-utils
sudo apt-get remove pavucontrol
sudo apt-get install pulseaudio
sudo apt-get install pulseaudio-utils
这里声音指示器和一些系统设置消失了，所以我不得不：
sudo apt-get install indicator-sound
sudo apt-get install unity-control-center
答案1
我找到了一种解决方法：重新安装了 pavucontrol，但后置麦克风没有出现，所以我更改了声音设置，现在它也出现在 pavucontrol 上，并且可以正常工作。唯一的问题是：如果我再次打开声音设置，它会显示数字输入，但这不是问题。谢谢！