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[Badr <ronsterp@xxxxxxxxx>]

I had the exact same problem. I was able to fix it eventually after some googling. Here is the fix:
In terminal type (lspci -nn | grep -i audio) you will get an output similar to mine which I believe because of two conflicting devices (
00:01.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:9840]
00:14.2 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller [1022:780d] (rev 02)

this will give you the pid and vid for each device, the two numbers at
the end of each line.

Now create a file /etc/modprobe.d/alsa-base.conf with the following, in
my case:

options snd-hda-intel index=0 model=auto vid=1022 pid=780d
options snd-hda-intel index=1 model=auto vid=1002 pid=9840

also pay attention to what module you are using and replace snd-hda-
intel if you are using different module accordingly.

Hope it works for you.

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https://bugs.launchpad.net/bugs/1361384

Title:
  Alsa and Pulse audio hang system when listening to music

Status in “alsa-utils” package in Ubuntu:
  New

Bug description:
  I seem to be getting a hang and crash of my system every time I listen to music in the background. I have tried both pulseaudio
  and alsa but both crash every day or two. It's rather annoying. I am using 14.04 Lubuntu and expect the music to not hang my system.
  Nick

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