On Fri, 2009-06-19 at 08:32 +0200, Takashi Iwai wrote: > At Fri, 19 Jun 2009 02:50:35 +0300, > Maxim Levitsky wrote: > > > > Hi, > > > > Due to lack of time, I didn't update kernel on my desktop system. > > Now I notice that analog loopback go removed. Why? > > Because it harms than helps more often. I've got tons of bug reports > and been upset just because users blindly set "Analog Loopback" mixer > switch and lost their sound output. This is no mixer element that > behaves intuitively -- it shuts out PCM output instead of adding the > analog loopback like other hardwares. Here it doesn't shut PCM. I just hear input in headphones, mixed with output. I suspect that this feature might not work correctly on newer devices that ones I have added. > > The feature is still available, though. You just need to give the > driver an instruction via sysfs. Namely, write to sysfs files > corresponding to the IDT codec like > # echo "loopback yes" > /sys/class/sound/hwC0D0/hints > # echo 1 > /sys/class/sound/hwC0D0/reconfig > Then the driver will reconfigure with the loopback mixer element. > > I have a patch series to add this with a "patch" firmware file to > make it easier, which I'm going to send an RFC to this ML soon later. > Take a look at topic/hda-patch branch on sound-unstable tree. > > > thanks, > > Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
