在我的华硕电脑上，使用 Kubuntu 14.04，如果我插入耳机，音频仍会从两个输出（扬声器和耳机）播放。我可以在启动后使用 alsamixer 或 Phonon 手动修复此问题，但这很烦人。我知道这是一个新问题，它已在 16.04 版本中修复，但我无法升级到此版本。那么，我该如何解决这个问题？
lspci -nn | grep -i audio
00:1f.3 Audio device [0403]: Intel Corporation Device [8086:9d70] (rev 21)
aplay -l
**** Lista di PLAYBACK dispositivi hardware ****
scheda 0: PCH [HDA Intel PCH], dispositivo 0: ALC256 Analog [ALC256 Analog]
Sottoperiferiche: 1/1
Sottoperiferica #0: subdevice #0
scheda 0: PCH [HDA Intel PCH], dispositivo 3: HDMI 0 [HDMI 0]
Sottoperiferiche: 1/1
Sottoperiferica #0: subdevice #0
scheda 0: PCH [HDA Intel PCH], dispositivo 7: HDMI 1 [HDMI 1]
Sottoperiferiche: 1/1
Sottoperiferica #0: subdevice #0
scheda 0: PCH [HDA Intel PCH], dispositivo 8: HDMI 2 [HDMI 2]
Sottoperiferiche: 1/1
Sottoperiferica #0: subdevice #0
amixer
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 87
Mono: Playback 60 [69%] [-20.25dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 87 [100%] [0.00dB] [on]
Front Right: Playback 87 [100%] [0.00dB] [on]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 87 [100%] [0.00dB] [on]
Front Right: Playback 87 [100%] [0.00dB] [on]
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',1
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958',2
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Auto-Mute Mode',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Enabled'
http://i65.tinypic.com/20aou49.png
我尝试过的解决方案（没有成功）：
- 编辑 alsa-base.conf：
回显“选项 snd-hda-intel 模型 = 自动”| sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel model=asus" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel model=laptop" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel position_fix=1 enable=yes" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel model=generic" | sudo tee -a /etc/modprobe.d/alsa-base.conf
（不在一起）