Microphone not working: Ubuntu 14.04.3

[hugof]

Originally Posted by mlukaszek

Hi,

Sounds systems used in Linux distros are quite flexible - so, it is possible swap the audio channels as you like.

Can you try this:
https://superuser.com/questions/5948...nels-in-ubuntu

Not sure about the mic though - so my proposals will be a bit vague.

First, inspect the output of:

$ cat /proc/asound/cards

I'll assume you have alsa-utils installed: does recording with ALSA utilities - like arecord - work?
ALSA mixer is (alsamixer) also quite good in diagnosing - do you see the input in it, is it not muted, are the recording levels right?

Thanks,
Michal

Michal,

The cat command gives me the following result:

cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0x94320000 irq 131
1 [Dock ]: USB-Audio - ThinkPad Basic USB 3.0 Dock
DisplayLink ThinkPad Basic USB 3.0 Dock at usb-0000:00:14.0-2.3, super speed

I the used alsamixer and made sure that everything is un-muted.
In the alsa mixer I also see S/PDIF, S/PDIF 1 and S/PDIF 2.
I have als set the mic boost to the maximum.

I have tested with Ubuntu's (use both the analogue and digital inputs).
I also tested with:

arecord test.wav

The result is I can hear very faint noise when I strike the mic.
The voice is imperceptibly low. So the input seems to be working.
Its just being picked up correctly. I retested the cable with the laptop's jack.
No problem here.

Can anyone tell me if they were able to use the mic inn Linux?

TIA.