罗技H340 USB耳机在Ubuntu 22.04杂音故障求助

你好，看到你在Ubuntu 22.04上使用罗技H340 USB耳机时遇到杂音问题，而且已经尝试修改PulseAudio配置、切换PipeWire驱动都没解决，我来给你几个实用的排查和解决方向试试：

• 更换USB端口排查干扰：前置USB端口容易因为供电不足或电磁干扰产生杂音，建议把耳机插到主板后置的原生USB接口上；如果之前用了USB集线器，直接连主板端口，跳过集线器试试。
• 微调PulseAudio采样率与缓冲区参数：虽然你已经修改过配置文件，但可以试试更针对性的设置：
  打开/etc/pulse/daemon.conf，找到以下参数并修改（如果是注释状态就去掉前面的分号）：

  default-sample-rate = 44100
  alternate-sample-rate = 48000
  default-fragments = 2
  default-fragment-size-msec = 10
  

  修改完成后重启PulseAudio服务：

  pulseaudio -k && pulseaudio --start
  

• 禁用USB音频设备自动休眠：系统的USB自动电源管理可能导致耳机工作异常，创建udev规则禁用它：
  新建规则文件：

  sudo nano /etc/udev/rules.d/99-usb-audio-power.rules
  

  写入以下内容：

  SUBSYSTEM=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="0a38", ATTR{power/autosuspend}="-1"
  

  保存退出后重新加载udev规则：

  sudo udevadm control --reload-rules && sudo udevadm trigger
  

• 检查Alsa混音器设置：打开终端输入alsamixer，按F6切换到罗技H340设备，查看各个通道的音量，确保没有通道音量拉满导致失真；如果杂音和麦克风相关，也可以尝试降低麦克风增益。

你的耳机设备信息： #

Name: alsa_output.usb-Logitech_Inc._Logi_USB_Headset_H340-00.analog-stereo
Description: Headset H340 Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 7
Mute: no
Volume: front-left: 20190 /  31% / -30.68 dB,   front-right: 20190 /  31% / -30.68 dB
balance 0.00
Base Volume: 58409 /  89% / -3.00 dB
Monitor Source: alsa_output.usb-Logitech_Inc._Logi_USB_Headset_H340-00.analog-stereo.monitor
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 = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "1"
alsa.card_name = "Logi USB Headset H340"
alsa.long_card_name = "Logitech Inc. Logi USB Headset H340 at usb-0000:00:14.0-1, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:14.0-usb-0:1:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.0/sound/card1"
udev.id = "usb-Logitech_Inc._Logi_USB_Headset_H340-00"
device.bus = "usb"
device.vendor.id = "046d"
device.vendor.name = "Logitech, Inc."
device.product.id = "0a38"
device.product.name = "Headset H340"
device.serial = "Logitech_Inc._Logi_USB_Headset_H340"
device.form_factor = "headset"
device.string = "front:1"
device.buffering.buffer_size = "352800"
device.buffering.fragment_size = "176400"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "Headset H340 Analog Stereo"
module-udev-detect.discovered = "1"
device.icon_name = "audio-headset-usb"
device.intended_roles = "phone"
Ports:
analog-output: Analog Output (type: Analog, priority: 9900, availability unknown)
Active Port: analog-output
Formats:
pcm

备注：内容来源于stack exchange，提问作者zarok13