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I had a problem with sound, so tried to fix it according to answers already here. None of them worked for me and actually made it even worse!

I deleted pulse setting as recommended in one of the answers here

$ rm -rf ~/.conf/pulse

I'm using Ubuntu 16.04, when I run

$ aplay -l
aplay: device_list:268: no soundcards found...

Sounds settings show "Dummy output"

I tried to reinstall alsa-base, pulseaudio but it didn't help.

$ alsamixer
cannot open mixer: No such file or directory
$ pulseaudio -D
E: [pulseaudio] main.c: Daemon startup failed.

EDIT: Now even Windows on the same machine doesn't recognize the device, so there might be a problem with device but I don't think so.

cubeception
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1 Answers1

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(I already posted this reply here: Mint Forums Post)

Hi, I'm not sure if you are still looking for a fix to this issue, but thank God and all the amazing people who researched this, I found a fix after a few tough days of research. I have an LG Gram 17 with ALC256 and Linux Mint (based on Ubuntu) and both my speakers and microphones were not detected. I made a video tutorial on how to fix it, and I also wrote a guide. If you want the video, here is the link: https://www.youtube.com/watch?v=Vz6jDUyn7S0

Here is a guide I wrote (at your own risk!) on how to fix the issue step by step if you don't want to watch the video:

Step 1 - Remove (backup) the old SOF drivers from your system:
a) sudo mv /lib/firmware/intel/sof* ~/Desktop/old-sof-backup
b) sudo mv /usr/local/bin/sof-* ~/Desktop/old-sof-backup

Step 2 - Download and install the newer drivers from the SOF Project Github repo:
Link: https://github.com/thesofproject/sof-bin

a) Open the directory for your desired SOF version in terminal, let's assume v2.1.1.
b) sudo rsync -a sof*v2.1.1 /lib/firmware/intel/
c) sudo ln -s sof-v2.1.1 /lib/firmware/intel/sof
d) sudo ln -s sof-tplg-v2.1.1 /lib/firmware/intel/sof-tplg
e) sudo rsync tools-v2.1.1/* /usr/local/bin

(If you don't want to use symbolic links, refer to the repository for instructions on how to install the drivers without symbolic links)

Step 3 - Download and install the fixes/patches from the following SOF Project Github repo:
Link: https://github.com/thesofproject/alsa-ucm-conf/tree/sof_ucm1

(Remove the old "/usr/share/alsa/ucm" directory and replace it with the newly downloaded one from the repo)
a) sudo rm -r /usr/share/alsa/ucm
b) sudo mv ./ucm /usr/share/alsa

Step 4 - REBOOT
After you reboot, all your speakers, microphones and everything will show up and will be working. HOWEVER, the microphone input and speakers volume will be lower than usual. Step 5-6 are the fix for this.

Step 5 - Raise the input/output volume using ALSAMIXER (after rebooting!)
a) Open alsamixer in terminal.
b) Press F5 to show all devices.
c) Raise everything (or what you need) to the maximum value possible.

Step 6 - Save the ALSAMIXER settings permanently for each reboot
(we use the first "store" command once to store the settings in the designated file, then each time you reboot, the "restore" command will restore the settings from this file)

a) alsactl --file ~/.config/asound.state store
b) Set the command alsactl --file ~/.config/asound.state restore to run automatically on each startup so that the stored alsamixer settings in step 6(a) are always restored.

Cheers to the lads here: https://bbs.archlinux.org/viewtopic.php?id=249900&p=4

Michael
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