[alsa-devel] [PATCH] ALSA: usb: Work around CM6631 sample rate change bug

[Torstein Hegge]

On Mon, Mar 04, 2013 at 09:53:54AM +0100, Takashi Iwai wrote:
> At Sun, 3 Mar 2013 20:29:22 +0100,
> Torstein Hegge wrote:
> > While this does fix the sample rate change problem, it introduces a new
> > problem. With at least one media player application (xbmc) this patch
> > causes the usb sound card to not output sound when starting a video
> > file. Skipping forward or backward in the video stream restores audio
> > output.
> > 
> > I haven't yet been able to look into why this happens, or why xbmc
> > behaves different from mplayer and vlc.
> 
> If the reset of interface is needed only when *changing* SRC, we can
> check the current rate against the previous rate and skip the reset?

That's right. I tried that, and it appears to have solved the issue with
xbmc. I'll clean up that code and send an updated patch.

Thanks.

Torstein