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Hello,

I simply cannot get the sound crackling fixed on my Fedora Box (4.1.3-200.fc22.x86_64). I am using pulse on the system and the error is:

ALSA lib pcm.c:7905:(snd_pcm_recover) underrun occurred

I already tried quite a lot, including

- Setting frangments in /etc/pulse/daemon.conf:

; default-fragments = 5
; default-fragment-size-msec = 2

- changing "/etc/pulse/default.pa" as described in http://thehumble.ninja/2014/02/06/fixing-alsa-lib-pcmc7843snd_pcm_recover-underrun-occurred-while-keeping-pulseaudio-in-your-system/

 

But nothing worked up to now. Can somebody help me on this please?

Greets,

Michael

Interesting article about making PulseAudio use dmix (so that Wine can use ALSA directly in parallel, as I understand).

But maybe the problem is elsewhere? Audio buffer underrun means that audio buffers were not refilled fast enough so eventually the card had nothing left to play; Maybe your system (hardware and/or drivers) is not powerful enough for the game options you selected, and can't keep up?

 

I switched down the graphics detail level, but same thing. Beside, the problem directly comes up when launching the game: There is only the logo with some simple background sound and already at this point, I have the crackling sound.

Try this setting:

change default-fragment-size-msec = 10

to default-fragment-size-msec = 5

That works for me.  You will need to restart or kill pulseaudio to hear if it worked.

I solved it with via the settings in /etc/pulse/daemon.conf ("default-fragments" and "default-fragment-size-msec"). Up to now, I only found some guesses how to configure this, but here is a very interesting link:

https://wiki.archlinux.org/index.php/PulseAudio/Troubleshooting#Glitches.2C_skips_or_crackling

Search for the section beginning with "Setting the default fragment number and buffer size in PulseAudio". Sure, you have to calculate a bit, but I guess this is not complicated and with the settings I found out via this, Skyrim works fine up to now.

Thanks a lot, I will mark this thread as solved.

 

Awesome!  Glad you got it working!