[alsa-devel] [PATCH 0/2] Make ASUS Xonar U3 S/PDIF channel accessible
denisw at online.de
Tue Dec 11 11:37:26 CET 2012
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:
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).
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 4453 bytes
Desc: S/MIME Kryptografische Unterschrift
More information about the Alsa-devel