Comment 16 for bug 1310260

TEMPORARY WORKAROUND (Worked for a short time)

I was trying to blacklist the module for the sound card on the GPU by blocking the module listed in
/proc/asound/modules. Unfortunately all of the cards even the radeon sound card listed snd-hda-intel as their driver so blacklisting was no option as it would have killed all my sound.

Fortunately an employee at my university found a workaround:

He used this chain of commands to tell ALSA not to use the radeon audio device

cat << EOF > /etc/modprobe.d/my-alsa.conf
options snd-hda-intel index=1,2,3 vid=0x8086,0x8086,0x1002 pid=0x9c20,0x9c32,0xaab0
alias snd-sound-slot-2 off
EOF

(or create a file named /etc/modprobe.d/my-alsa.conf and add the towo lines in the middle)

Sound slot off deactivates the third card (counting starts at 0 therefore slot 2).
You can get the index of your sound cards by executing LANG=C aplay -l which looks like this for me:

root@HP-EliteBook-850-G1:~# LANG=C aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 0: 92HD91BXX Analog [92HD91BXX Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

It lists my radeon audio device as card3

After that he told me that the init ram disk has to be rebuilt which he did by executing this command.
update-initramfs -k all -u

After a reboot my sound works flawlessly now.
As it stands the bug is not fixed but can be avoided this way. The downside is, that I have no hdmi audio because of that.

EDIT: During me writing this message the sound stopped working again. I have no idea why.