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声音设置中没有设备

tag-icon • tag-icon sound system
声音设置中没有设备

我正在使用 Ubuntu 20.04.1 LTS。如您在屏幕截图中看到的，声音设置中没有显示任何设备，所有字段都是空的。

声音设置

以下是输出aplay -l：

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC257 Analog [ALC257 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
card 1: J40 [Jabra Evolve2 40], device 0: USB Audio [USB Audio]
  Subdevices: 1/1 Subdevice #0: subdevice #0
card 2: Au [ThinkPad USB-C Dock Gen2 USB Au], device 0: USB Audio [USB Audio]
  Subdevices: 1/1 Subdevice #0: subdevice #0

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