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1.

tag-icon • tag-icon 14.04 soundcard hda-intel
1. 
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: 92HD71B7X Analog [92HD71B7X Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: 92HD71B7X Digital [92HD71B7X Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

1.

我安装了 gnome-alsamixer 来仔细检查声音设置，一切正常但音量仍然很低。

2.

添加

#/etc/modprobe.d/alsa-base.conf options snd-hda-intel model=generic

进而

sudo alsa force-reload

音量仍然下降

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