[alsa-devel] Cache issue on BayTrail (ValleyView2) HD-audio

[Takashi Iwai]

At Tue, 25 Nov 2014 12:48:00 +0100,
Takashi Iwai wrote:
> 
> Hi Mengdong,
> 
> right now I'm playing onboard HD-audio on a Baytrail (ValleyView2)
> machine, not DP/HDMI output, and I noticed that the snooping doesn't
> seem working with this.  The playback sometimes stutters / gets
> noises.  This is a typical behavior with caching mismatch and indeed
> it works when I disable snooping via snoop=0 option.
> 
> Could you check whether this can be seen generically?  Also, can
> anyone check whether snoop=0 for Baytrail HD-audio causes any issues?
> 
> In general, snoop=0 isn't too bad (IIRC, Windows does it as default),
> so we can turn it off at least for Baytrail as default.

Scratch that.  This turned out to a false-positive, a wrong file was
checked.  Sorry for the noise.


Takashi