当我插入耳机时，我会看到以下输出设备pavucontrol：
Speakers
Analog Output
Headphones (unplugged)
选择扬声器将输出发送到扬声器+耳机。
选择模拟输出或耳机（未插入）仅将输出发送到耳机。
如果我拔掉耳机，我会得到：
Speakers (unavailable)
Analog Output
Headphones (plugged in)
无论我选择什么，我都听不到任何音频。
PulseAudio 似乎对我的耳机感到困惑：拔掉耳机并不会导致我的扬声器消失。
我如何告诉 PulseAudio：
- 我的扬声器将留在这里。他们永远不会缺席。
- 当您认为我的耳机未插入时，我的耳机已插入，反之亦然。
pulseaudio -vvvv拔下耳机时的输出：
D: [pulseaudio] module-alsa-card.c: Jack 'Front Mic Jack' is now unplugged
D: [pulseaudio] device-port.c: Setting port analog-input-microphone-front to status no
D: [pulseaudio] device-port.c: Setting port analog-input-microphone-internal to status unknown
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
D: [pulseaudio] device-port.c: Setting port analog-output-speaker to status no
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status yes
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
插入耳机时：
D: [pulseaudio] module-alsa-card.c: Jack 'Front Mic Jack' is now plugged in
D: [pulseaudio] device-port.c: Setting port analog-input-microphone-front to status yes
D: [pulseaudio] device-port.c: Setting port analog-input-microphone-internal to status no
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
D: [pulseaudio] device-port.c: Setting port analog-output-speaker to status unknown
D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status no
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
上述内容使我相信“module-alsa-card.c”中的某处缺少“not”，并且它以某种方式感觉耳机端口也是麦克风端口。