Re: Sleep fix for iBook 800 sound

[Takashi Iwai <tiwai@suse.de>]

Hi,

At Wed, 07 Apr 2004 16:35:11 +1000,
Benjamin Herrenschmidt wrote:
> 
> On Wed, 2004-04-07 at 16:25, Ian McKellar wrote:
> > So, 
> > 
> > I have an iBook 800Mhz and since I've moved to alsa and linux 2.6 I've
> > had issues with sound oopsing in sleep, kind of like this:
> 
> Is sound working at all ? I suspect you didn't have the i2c-keywest
> module insmod'ed. There is indeed a problem in all our i2c based
> sound drivers where we don't always check that the i2c client was
> instanciated before doing some things...
> 
> Takashi, how is this patch ?

yes, the patch is fine, but i guess it won't fix Ian's mixer problem
after resume.  the real problem is that i2c.client is reset to NULL in
sleep_notify callback.

i just took a quick look at dmasound code again, but the code path
looks almost same, i.e.

	sleep_notify_callback(PBOOK_WAKE)
	-> leave_sleep callback
	-> resume mixer values

maybe dmasound resumes the mixer setting in somewhere else, too?


Takashi


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