我在华硕 HM81-PLUS 主板上运行 Kubuntu。它有一个 RealTek ACL887 音频芯片。在昨天升级到 20.04 之前，我从未遇到过音频问题。现在前面板插孔（麦克风和耳机）不工作。具体来说，等离子音频混音器应用程序无法检测何时插入麦克风或耳机，因此它们无法与任何应用程序一起使用。Alsamixer 显示前置麦克风未静音且增益最大，耳机静音。如果我取消耳机静音，它们可以工作，但重启后无法继续工作。如果我将麦克风插入后面板插孔，它会被检测到并工作。（我已经从记忆棒运行了实时 Kubuntu 18.04，一切正常。）
我花了很多时间在网上搜索，但没找到任何有用的方法。我尝试过的方法包括：
- 使用 hdajackretask 覆盖设置。
- “arecord -l” 显示的是备用声卡，因此我将“load-module module-alsa-source device=hw:1,2”插入到 /etc/pulse/default.pa 中。Plasma 混音器中出现了一个麦克风，但它没有在 Zoom 或 Skype 中产生音频信号。
- 我尝试使用 libpulse-mainloop-glib0 libpulse0 libpulsedsp pulseaudio pulseaudio-module-bluetooth pulseaudio-utils 版本 3 和 3.2（而不是 3.6）
我想我可以使用后置插孔，但我不喜欢一直插着麦克风，而且在 20.04 之前一切都正常！
在此先感谢您的帮助。
一些输出：
消息 | grep snd
[ 3.232493] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 3.267957] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC887-VD: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
[ 3.267959] snd_hda_codec_realtek hdaudioC1D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 3.267960] snd_hda_codec_realtek hdaudioC1D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[ 3.267961] snd_hda_codec_realtek hdaudioC1D0: mono: mono_out=0x0
[ 3.267962] snd_hda_codec_realtek hdaudioC1D0: dig-out=0x11/0x0
[ 3.267963] snd_hda_codec_realtek hdaudioC1D0: inputs:
[ 3.267964] snd_hda_codec_realtek hdaudioC1D0: Front Mic=0x19
[ 3.267966] snd_hda_codec_realtek hdaudioC1D0: Rear Mic=0x18
[ 3.267967] snd_hda_codec_realtek hdaudioC1D0: Line=0x1a
[ 7.751169] snd_hda_codec_hdmi hdaudioC0D0: HDMI: pin nid 6 not registered
[ 7.766586] snd_hda_codec_hdmi hdaudioC0D0: HDMI: pin nid 6 not registered
记录-l
**** List of CAPTURE Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 2: ALC887-VD Alt Analog [ALC887-VD Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
cat /proc/asound/card*/codec* | grep Codec
Codec: Intel Haswell HDMI
Codec: Realtek ALC887-VD
我跑了
curl https://gitlab.freedesktop.org/pulseaudio/pulseaudio/raw/master/src/utils/pa-info?inline=false | bash | nc termbin.com 9999
输出保存在https://termbin.com/3h0z（但我不知道要多久）。
更新：
我突然想到可以运行“curlhttps://gitlab.freedesktop.org/pulseaudio...”命令来自实时 Kubuntu 18.04 发行版并查看输出中的差异。有相当多的差异。其中大多数对我来说看起来微不足道。例外情况如下所列。
alsactl 输出：之间的差异：
- 控制.13：值.0，值.1
- 控制.14：值.0，值.1
- 控制.20：值
Ubuntu20.04：
control.13 {
iface MIXER
name 'Front Mic Playback Volume'
value.0 31
value.1 31
comment {
access 'read write'
type INTEGER
count 2
range '0 - 31'
dbmin -3450
dbmax 1200
dbvalue.0 1200
dbvalue.1 1200
}
}
Ubuntu18.04：
control.13 {
iface MIXER
name 'Front Mic Playback Volume'
value.0 0
value.1 0
comment {
access 'read write'
type INTEGER
count 2
range '0 - 31'
dbmin -3450
dbmax 1200
dbvalue.0 -3450
dbvalue.1 -3450
}
}
Ubuntu20.04：
control.14 {
iface MIXER
name 'Front Mic Playback Switch'
value.0 true
value.1 true
comment {
access 'read write'
type BOOLEAN
count 2
}
}
Ubuntu18.04：
control.14 {
iface MIXER
name 'Front Mic Playback Switch'
value.0 false
value.1 false
comment {
access 'read write'
type BOOLEAN
count 2
}
}
Ubuntu20.04：
control.20 {
iface MIXER
name 'Input Source'
value 'Rear Mic'
comment {
access 'read write'
type ENUMERATED
count 1
item.0 'Front Mic'
item.1 'Rear Mic'
item.2 Line
}
}
Ubuntu18.04：
control.20 {
iface MIXER
name 'Input Source'
value 'Front Mic'
comment {
access 'read write'
type ENUMERATED
count 1
item.0 'Front Mic'
item.1 'Rear Mic'
item.2 Line
}
}
pactl 列表：“来源 #1” 之间的差异
Kubuntu20.04：[无]
Ubuntu18.04：
Source #1
State: SUSPENDED
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: 8
Mute: no
Volume: front-left: 10387 / 16% / -48.00 dB, front-right: 10387 / 16% / -48.00 dB
balance 0.00
Base Volume: 6554 / 10% / -60.00 dB
Monitor of Sink: n/a
Latency: 0 usec, configured 0 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 = "ALC887-VD Analog"
alsa.id = "ALC887-VD Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "1"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xf7e10000 irq 37"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1b.0"
sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card1"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "8c20"
device.product.name = "8 Series/C220 Series Chipset High Definition Audio Controller"
device.form_factor = "internal"
device.string = "front:1"
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 ALC887-VD"
alsa.components = "HDA:10ec0887,10438576,00100302"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
Ports:
analog-input-front-mic: Front Microphone (priority: 8500, not available)
analog-input-rear-mic: Rear Microphone (priority: 8200, not available)
analog-input-linein: Line In (priority: 8100, not available)
Active Port: analog-input-front-mic
Formats:
pcm
amixer 输出：“简单混频器控制‘输入源’，0：Item0”中的差异
Ubuntu20.04：
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Rear Mic'
Ubuntu18.04：
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Front Mic'
另一个更新
我开始怀疑我的问题与内核有关。命令“sudo hdajacksensetest -c 1”给出
Pin 0x14 (Green Line Out, Rear side): present = Yes
Pin 0x18 (Pink Mic, Rear side): present = No
Pin 0x19 (Pink Mic, Front side): present = No
Pin 0x1a (Blue Line In, Rear side): present = No
Pin 0x1b (Green Headphone, Front side): present = No
因此插孔检测过程不会检测到前面板麦克风。我对后面板的麦克风运行了相同的命令，并且运行正常。