Fix microphone on Lenovo IdeaPad 320 on Ubuntu 18.04

fix_mic_lenovo320.md

In /usr/share/pulseaudio/alsa-mixer/paths/analog-input-internal-mic.conf and /usr/share/pulseaudio/alsa-mixer/paths/analog-input-mic.conf:

• Under [Element Internal Mic Boost] set volume to zero.
• Under [Element Int Mic Boost] set volume to zero.
• Under [Element Mic Boost] set volume to zero

Find your source name from the following command; mine is alsa_input.pci-0000_00_1f.3.analog-stereo

  $ pacmd list-sources | grep 'name:.*input'

Edit /etc/pulse/default.pa and add the following lines, where INPUT_NAME is name of the input source from above step:

`load-module module-remap-source source_name=record_mono master=INPUT_NAME master_channel_map=front-left channel_map=mono`
`set-default-source record_mono`

Then restart PulseAudio:

  $ pulseaudio -k
  $ pulseaudio --start

thanks, finally got my mic working.
I made a script to automate the process
my contribution to your great finding :)

sudo cp /etc/pulse/default.pa /etc/pulse/default.pa.bkp
#undo
#sudo cp /etc/pulse/default.pa.bkp /etc/pulse/default.pa

echo " " | sudo tee -a /etc/pulse/default.pa
echo '############################### FIX MIC FOR LENOVO 320' | sudo tee -a /etc/pulse/default.pa
echo load-module module-remap-source source_name=record_mono master=$(pacmd list-sources | grep 'name:.*input'| cut -d"<" -f2 |cut -d">" -f1) master_channel_map=front-left channel_map=mono | sudo tee -a /etc/pulse/default.pa
echo set-default-source record_mono | sudo tee -a /etc/pulse/default.pa

pulseaudio -k
sleep 2
pulseaudio --start

Thanks! Really fixed here using Ubuntu 20.04!
Using 'volume = 0' under [Element Internal Mic Boost] and [Element Int Mic Boost], in '/usr/share/pulseaudio/alsa-mixer/paths/analog-input-internal-mic.conf' -> after reboot would start the mic with no volume, and would need to increase it with alsamixer.
Solved it by using both with 'volume = 100'.

I can´t speak in my lenovo IDEAPAD 320,, but I can hear everything, (youtube/spotify/etc) iḿ using Endeavour OS, someone can help?

alsa_input.pci-0000_00_1f.3.analog-stereo

Thank you so much. You helped me to use Linux again!
It works on "Mx Linux 21" on "Lenovo Ideapad 330"

This works but a week later, it reverts to the original and I had to reapply this fix again. Is there any permanent solution? Is there a bug report on Ubuntu Launchpad so I can vote? (I couldn't find it) How come Ubuntu haven't fixed this for years?

Not only Ubuntu, this also happens with Fedora.

this fix does not work on ubuntu 22.04. please help

this fix does not work on Ubuntu 22.04 for me too. please help

Soloution!!!!!!!!!!!

I was just wandering around in all the forums to solve. inside canonical bug report some just said after doing the fix, just suspend the ubuntu and wake it up. i thought it is silly but gave it a shot and bingo my microphone working good as new.
it really is silly but it works.

I hope all the problems be sovled with it.

Regards

This procedure worked for my Acer Aspire 5 A515-44-R2SA laptop running Xubuntu 22.04 up-to-date with these audio characteristics:
Device-1: AMD Renoir Radeon High Definition Audio driver: snd_hda_intel
Device-2: AMD Raven/Raven2/FireFlight/Renoir Audio Processor driver: N/A
Device-3: AMD Family 17h HD Audio driver: snd_hda_intel
Sound Server-1: ALSA v: k6.5.0-14-generic running: yes
Sound Server-2: PulseAudio v: 15.99.1 running: yes
Sound Server-3: PipeWire v: 0.3.48 running: yes

I suspect that a recent Ubuntu base update mangled my analog-input-internal-mic.conf file.