No audio in Ubuntu server 14.04

Your ALSA information is located at http://www.alsa-project.org/db/?f=d0de00eead6cdd53133912e56b115e16cdf99479

execute this command and reboot:

sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install pavucontrol linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; ubuntu-support-status; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

Source:
https://answers.launchpad.net/ubuntu/+source/alsa-driver/+question/264115

Hi,
Thanks for your reply.
I tried that but nothing changed.
I noticed this though, maybe it is related to the problem:

W: Failed to fetch http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

The messages like

W: Failed to fetch http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

are caused by the fact that you have enabled a PPA as software source, which does not provide software for your Ubuntu release.

What is the output of the terminal commands

uname -a
lsb_release -crid
grep ubuntu-audio-dev /etc/apt/sources.list /etc/apt/sources.list.d/*.list

(I no not think that this configuration error related to repository sources has anything to do with your sound problem.)

Hello,
Here:

Linux prokopis-OptiPlex-745 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty

grep ubuntu-audio-dev /etc/apt/sources.list /etc/apt/sources.list.d/*.list:
/etc/apt/sources.list.d/ubuntu-audio-dev-alsa-daily-trusty.list:deb http://ppa.launchpad.net/ubuntu-audio-dev/alsa-daily/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-alsa-daily-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-audio-dev/alsa-daily/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-alsa-daily-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-audio-dev/alsa-daily/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-ppa-trusty.list:deb http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-ppa-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-ppa-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-audio-dev-ppa-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu trusty main

Thanks.

sudo rm /etc/apt/sources.list.d/ubuntu-audio-dev-ppa-*

Then retry the command I gave. The PPA doesn't support Trusty.

I tried the command again, I got some errors about pulseaudio, which I think I don't have or need, but the problem remains.
I have uploaded the output here: https://drive.google.com/file/d/0B-QF2ofbHD2fR1VmRUVZelpFX3M/view?usp=sharing

I am starting to lose hope.

It seems I am the only one having this problem.

With the number of people using Ubuntu. I very much doubt you are the only person with sound issues in Ubuntu server....

If you execute the command sequence

sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install pavucontrol linux-sound-base alsa-base alsa-utils linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; ubuntu-support-status; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

What is its output?

Maybe the file: /etc/modprobe.d/alsa-base.conf needs to be configured for my audio card, but I don't know how.

Ha!
Good news.
I updated the system once again and it installed a new update "hda.. something" and after a reboot the audio is back. Awesome.