正如标题所述，即使识别了 HDMI 连接，声音也不会发出。我已按照所提到的操作这里安达这里。
这是 aplay 输出。
$> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC1150 Analog [ALC1150 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: ALC1150 Digital [ALC1150 Digital]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
我已经安装了脉冲音频：
sudo apt-get install pavucontrol
它似乎识别了声音，但就是发不出来！
这是 alsa 混音器的外观。我有一张 nvidia 卡。
我已经使用软件管理器重新安装了 alsa。