我正在运行 Arch Linux。尽管已加载驱动程序“snd_hda_intel”，但该卡没有声音。声音从左侧扬声器发出。
我用谷歌搜索了一下，发现其他人也遇到了问题：
- http://ubuntuforums.org/showthread.php?t=1858638
- http://steamcommunity.com/groups/steamuniverse/discussions/1/648814842621135143/
- http://ubuntuforums.org/showthread.php?t=1036508
- https://askubuntu.com/questions/43628/no-sound-with-intel-82801i-audio
- https://superuser.com/questions/912553/no-sound-on-arch-linux-alsa
所以我想我应该在 stackexchange 上针对这个问题提出一个问题。
uname-rnm
arch 4.2.5-1-ARCH x86_64
grep -i 音频
（我只关心82801I（ICH9系列）高清音频控制器。）
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]
lshw -c 多媒体
（我只关心82801I（ICH9系列）高清音频控制器。）
*-multimedia
description: Audio device
product: RV710/730 HDMI Audio [Radeon HD 4000 series]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0.1
bus info: pci@0000:01:00.1
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:28 memory:fdcfc000-fdcfffff
*-multimedia
description: Audio device
product: 82801I (ICH9 Family) HD Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:27 memory:fdff8000-fdffbfff
aplay-l
（我只关心82801I（ICH9系列）高清音频控制器。）
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC662 rev1 Digital [ALC662 rev1 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
amixer sset Master 取消静音
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 64
Mono: Playback 43 [67%] [-21.00dB] [on]
阿尔萨混合器
