[Alsa-user] Figure out hardware issue with headphone jack on TUXEDO Book BU1406

[Paul M. <pm...@mo...>]

Dear ALSA folks,


On a TUXEDO Book BU1406, the internal speakers stopped working. Sound 
still works when plugging in headphones or over HDMI [1]. This is 
reproducible with Linux 4.9 up to 4.11-rc6, and it worked a month ago, 
so I don’t think it’s a Linux kernel issue.

I assume it’s an hardware issue, that the for whatever reason, the 
system thinks headphones are plugged in all the time, and that the 
sensor(?) is damaged.

Can I somehow verify that with the output created by `ubuntu-bug audio`?

I think the excerpt below is from PulseAudio, but shows `available: no` 
for the output speaker.

```
   	ports:
   		analog-input-internal-mic: Internes Mikrofon (priority 8900, 
latency offset 0 usec, available: unknown)
   			properties:
   				device.icon_name = "audio-input-microphone"
   		analog-input-mic: Mikrofon (priority 8700, latency offset 0 usec, 
available: no)
   			properties:
   				device.icon_name = "audio-input-microphone"
   		analog-output-speaker: Lautsprecher (priority 10000, latency offset 
0 usec, available: no)
   			properties:
   				device.icon_name = "audio-speakers"
   		analog-output-headphones: Kopfhörer (priority 9000, latency offset 
0 usec, available: yes)
   			properties:
   				device.icon_name = "audio-headphones"
   		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 
usec, available: no)
   			properties:
   				device.icon_name = "video-display"
    		hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 
0 usec, available: no)
   			properties:
   				device.icon_name = "video-display"
   		hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 
0 usec, available: no)
   			properties:
   				device.icon_name = "video-display"
```

It’d be great, if you could tell me, what to look at, with the 
headphones plugged and unplugged.


Kind regards,

Paul


[1] https://bugzilla.kernel.org/show_bug.cgi?id=194901