linux-kernel - Re: Audio crackles with 4.1-rc1

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Date:	Tue, 19 May 2015 22:53:10 +0100
From:	Jonathan McDowell <noodles@...th.li>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: Audio crackles with 4.1-rc1

On Tue, May 19, 2015 at 07:09:12PM +0200, Takashi Iwai wrote:
> At Tue, 19 May 2015 17:19:11 +0100,
> Jonathan McDowell wrote:
> > 
> > On Tue, May 19, 2015 at 08:15:32AM +0200, Takashi Iwai wrote:
> > > Does the patch below have any improvement?
> > 
> > I still get a clicking on the standby -> active transition with the
> > patch provided on top of 4.1-rc4.
> 
> OK, just to be sure, could you check whether changing msleep(10) to
> msleep(100) makes no difference?  Also put a line like
> 	pr_info("XXX power up %x\n", nid);
> after msleep() call to see which nodes are powered up dynamically.

Increasing the delay, if anything, makes the crackle when powering up
seem a little longer. dmesg log looks like:

[ 4206.075557] XXX power up 2
[ 4206.179671] XXX power up 14
[ 4206.291758] XXX power up 3

J.

-- 
                                            xmpp:noodles@...th.li
"f u cn rd ths, u cn gt a gd jb n cmptr
                                            prgrmmng." -- Simon
Cozens, ox.os.linux
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