目前硬件功能基本正常，但是外放、耳机都没有声音
speaker-test 输出如下：
speaker-test 1.1.8
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Playback open error: -2,No such file or directory
看了arch论坛的几个帖子，尝试在~/.asoundrc添加
defaults.pcm.device 3
之后，speaker-test有稳定输出如下，然而依然听不到声音：
k@ringo ~ $ speaker-test
speaker-test 1.1.8
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
0 - Front Left
Time per period = 2.649456
0 - Front Left
Time per period = 2.986560
0 - Front Left
Time per period = 2.986631
0 - Front Left
（省略）
花粉俱乐部有个名为“Ubuntu 16.04下 声音很小”的帖子，照着做了，也没有效果
求助，感谢
speaker-test 输出如下：
speaker-test 1.1.8
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Playback open error: -2,No such file or directory
看了arch论坛的几个帖子，尝试在~/.asoundrc添加
defaults.pcm.device 3
之后，speaker-test有稳定输出如下，然而依然听不到声音：
k@ringo ~ $ speaker-test
speaker-test 1.1.8
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
0 - Front Left
Time per period = 2.649456
0 - Front Left
Time per period = 2.986560
0 - Front Left
Time per period = 2.986631
0 - Front Left
（省略）
花粉俱乐部有个名为“Ubuntu 16.04下 声音很小”的帖子，照着做了，也没有效果
求助，感谢
