EDIT: I realized that every time the audio would be crackling also computer performance overall would be worse, reason was broken GPU.

So I am running a HDMI cable to my television from my PC where I have Ubuntu 21.04 and I have been battling against an issue for few weeks now where the HDMI audio is crackling and distorted

Everything I have tried so far:

Adding "tsched=0" to back of the line "load-module module-udev-detect"

Adding "options snd-hda-intel vid=8086 pid=8ca0 snoop=0" to alsa-base.conf file

Adding "intel_iommu=igfx_off" to kernel command line

snd_hda_intel_power_save disabled permanently by adding "options snd_hda_intel power_save=0" to the end of /etc/modprobe.d/alsa-base.conf

Trying different settings in daemon.conf

Deleting speech dispatcher

Reinstalling alsa-base pulseaudio

Muting other outputs in alsamixer that are not in use

Trying different HDMI port

Trying different sound settings on my TV

And those were the tricks I was able to find after several hours of intense googling, none of which unfortunately worked. Only solution I have found out that if I restart my computer it will start to work, atleast after few restarts. In related to this it is probably good to mention that doing "sudo killall pulseaudio" does not make any difference.

Here is alsa-info.txt Link to justpaste.it because it wouldn't fit here

In the alsa-info there is a line near bottom that says "snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec" Is this something worth looking at? I tried to google about it but to my (mediocre) understanding this is related to people who run HDMI from back of their motherboard and only have integrated graphics. As I am running the HDMI from back of my 5700XT, that line doesn't concern me, am I right?

Specs: AMD 5700XT, Asus Prime Z590-A, TV is LG 47LM670T-ZA

1 Answer 1


I am experiencing the same problem. I use killall speech-dispatcher when that occurs. It seems that you can remove the speech-dispatcher if you do not use it. It will solve permanently the problem

  • Thanks for youe time and answer but like I mentioned i've already deleted it.
    – OM629
    Commented Nov 18, 2021 at 20:05

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