[alsa-devel] [ISSUE] crackles and clicks

Daniel Mack daniel at zonque.org
Tue Jan 14 17:08:54 CET 2014

On 01/14/2014 04:59 PM, LANGLOIS Olivier PIS -EXT wrote:
> I experience the audible clicks with VLC but I have reproduced it 
> with aplay as well. The clicks that I hear corresponds to underruns.
>  For the records, this is not happening with a USB device. I have a 
> Intel HDA sound card.

Ok, sorry. I missed that detail.

> I did chime in the discussion to point out that
> the problem could come from something else than ALSA or the sound
> card driver. Here is the output of my aplay session. This makes me
> doubt my hypothesis. I'll check the cpu usage while the Wifi is on
> but not connected or see if running aplay in real-time prio makes 
> things any better.

I see, and I'd say that's a sign that the wifi driver is holding off the
system way too long somewhere, rather than a problem with the sound driver.

Could you repost your findings from the earlier mail and send them to
Larry.Finger at lwfinger.net and linux-wireless at vger.kernel.org? The
wireless people might have an idea what's going on.


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