[alsa-devel] Fwd: Re: no reset_resume for driver snd-usb-audio for logitech headset H600

[Takashi Iwai]

At Sat, 11 Jan 2014 11:08:39 +0100,
<baumber at hotmail.com> wrote:
> 
> FWD:
> 
> Any news to the snd-usb-audio issue?
> 
> Thanks, Bernhard
> 
> Old Message:
> -------------
> I have tested the patch with kernel 3.12.0 with suspend and hibernate, and the problem is gone.
> 
> No messages "no reset_resume for driver snd-usb-audio?" or other negative effects/messages.
> 
> After resume, the usb_audio_device (Headset) is the master channel in KDE Mixer, as it should be.
> 
> => So the problem is solved for me.
> 
> Can you please add the patch to the latest kernels and LTS-kernels or whitelist the workaround for my device (ID 046d:0a29 Logitech, Inc. H600 [Wireless Headset])

The "reset_resume" kernel message was known to be harmless, and now
it's degraded as a debug message.  That's the only change, so there is
no functional change.

That being said, you just need to ignore the kernel messages in the
old kernels.  Or, feel free to submit the commit [0a56b4fa6844: USB:
change dev_warn about missing reset-resume to dev_dbg] to stable
kernel.


Takashi

> 
> Thanks, Bernhard
> 
> On 2013-10-20 23:35, Takashi Iwai wrote:
> > At Sun, 20 Oct 2013 23:18:13 +0200,
> > <baumber at hotmail.com> wrote:
> >>
> >> On 2013-10-09 11:16 (CEST,UTC+2), Takashi Iwai wrote:
> >>>>>> diff --git a/sound/usb/card.c b/sound/usb/card.c
> >>>>>> index 9d9de8d..c591a83 100644
> >>>>>> --- a/sound/usb/card.c
> >>>>>> +++ b/sound/usb/card.c
> >>>>>> @@ -747,6 +747,7 @@ static struct usb_driver usb_audio_driver = {
> >>>>>>    	.disconnect =	usb_audio_disconnect,
> >>>>>>    	.suspend =	usb_audio_suspend,
> >>>>>>    	.resume =	usb_audio_resume,
> >>>>>> +	.reset_resume =	usb_audio_resume,
> >>>>>>    	.id_table =	usb_audio_ids,
> >>>>>>    	.supports_autosuspend = 1,
> >>>>>>    };
> >>
> >> Shall I add the line in b/sound/usb/card.c and try it? Which kernel version shall I use?
> >
> > It doesn't matter which kernel version is.
> > The error message should disappear, but I don't know whether any other
> > positive effect you get.  As Clemens pointed, there can be some
> > negative effects by this, so it cannot be taken as is.  But at least,
> > it'd be good to know the result...
> >
> >
> > thanks,
> >
> > Takashi
> 
> 
> 
> 
> 
>