[alsa-devel] [PATCH 0/2] Make ASUS Xonar U3 S/PDIF channel accessible

Takashi Iwai tiwai at suse.de
Tue Dec 11 12:41:19 CET 2012

At Tue, 11 Dec 2012 11:37:26 +0100,
Denis Washington wrote:
> Hello,
> This is my first ALSA patch ever (in fact, also my first kernel patch 
> and my first e-mail to this mailing list); as such, I'm sorry when I did 
> something wrong and/or didn't follow the procedure properly. I hope you 
> can forgive me.
> I recently bought an ASUS Xonar U3 USB audio card. It general it works 
> well with Linux, but unfortunately, it's PCM output channel is unusable 
> for headphones because it allows virtually no volume control (maximum 
> loudness is already reach at a volume level of 2 or 3). The card does 
> also have a digital (S/PDIF) output channel, which however isn't 
> switched on by the Linux USB audio driver:
> http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg28970.html
> When I boot into Windows (where the ASUS driver seemingly enables the 
> channel) and then reboot into Linux, I can use this channel and control 
> volume as expected. It's just this turning on of S/PDIF which is 
> missing, as suggested by the alsa-user thread linked to above.
> The patchset that follows enables S/PDIF on the Xonar U3 by using the 
> (seemingly compatible) mixer quirks code as for the U1, just as done and 
> tested by the initiator of the alsa-user thread, together with a very 
> minor cleanup (renaming internal xonar_u1_* identifiers to just 
> xonar_u_*). The change seems to work well (tested with the 3.7.0 Ubuntu 
> kernel as found in today' daily version).

Thanks for patches.

I think the rename of xonar_u1_* isn't needed.  What we need is rather
giving more comments there, that it's for both U1 and U3.

In anyway, could you resubmit with your sign-off?
Put a line like
	Signed-of-by: Your Name <foo at bar.com>
in the tail of the change log text.

See Documentation/SubmittingPatches the section 12 "Sign your work"
for details.


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