No sound after Ubuntu base update

Question

My Info: http://www.alsa-project.org/db/?f=cbf6b64acdde8c2f2d3a24cae453b4f2817e8a1e

Today I updated Ubuntu base via Software Updater and now my sound does not work out of built in laptop speakers or the headphone jack. Software Updater may have updated other things besides Ubuntu base, but unfortunately I wasn't paying much attention.

This log is about the time when update occurred and the problem began, but it seems to be mostly vlc related stuff, so I don't know.

/var/log/apt/history.log

Start-Date: 2014-09-09  12:42:13

Commandline: aptdaemon role='role-commit-packages' sender=':1.241'

Upgrade: vlc-plugin-notify:amd64 (2.2.0+ppa2.1, 2.2.0+ppa2.2), libvlccore8:amd64 
(2.2.0+ppa2.1, 2.2.0+ppa2.2), vlc-nox:amd64 (2.2.0+ppa2.1, 2.2.0+ppa2.2), vlc-plugin-
samba:amd64 (2.2.0+ppa2.1, 2.2.0+ppa2.2), libnss3-1d:amd64 (3.15.4-1ubuntu7, 
3.15.4-1ubuntu7.1), vlc-data:amd64 (2.2.0+ppa2.1, 2.2.0+ppa2.2), libnss3-nssdb:amd64 
(3.15.4-1ubuntu7, 3.15.4-1ubuntu7.1), libnss3:amd64 (3.15.4-1ubuntu7, 
3.15.4-1ubuntu7.1), vlc:amd64 (2.2.0+ppa2.1, 2.2.0+ppa2.2), libvlc5:amd64 
(2.2.0+ppa2.1, 2.2.0+ppa2.2)


End-Date: 2014-09-09  12:43:01

The Sound Settings (unity-control-center sound) does not show any devices.

AlsaMixer, after F5 (show all) has 2 channels I can change PCM and Digital, I swear there used to also be a master channel (and maybe others) before.

Tried:

pulseaudio -k

pulseaudio --start

sudo alsa force-reload

sudo apt-get remove --purge alsa-base pulseaudio 

sudo apt-get install alsa-base pulseaudio

sudo alsa force-reload

• older kernel and newer rc kernel

• aplay /usr/share/sounds/alsa/Front_Center.wav says it played, but no sound heard

I ran the alsa info script:

wget http://www.alsa-project.org/alsa-info.sh -O alsa-info.sh && bash alsa-info.sh

My Info: http://www.alsa-project.org/db/?f=cbf6b64acdde8c2f2d3a24cae453b4f2817e8a1e

Answer 1

Booted into recovery mode via grub and the sound worked as expected. Then I booted normally and the sound worked.