> > I don't know how to test it in a correct way. I don't know what hw:0,0 stands for in my case. So far I did: > > I chose surround 4.0 and tested in settings ><a href="http://i.imgur.com/0zBIvDV.png">http://i.imgur.com/0zBIvDV.png</a> > I could hear only rear left, rear right. > > > pulseaudio verbose log as described here (with surround 4.0) ><a href="https://wiki.ubuntu.com/PulseAudio/Log">https://wiki.ubuntu.com/PulseAudio/Log</a> > I played youtube, tv tuner and radio stream from clementine ><a href="http://pastebin.com/CDmpLkn1">http://pastebin.com/CDmpLkn1</a> ( 0.097| 0.000) I: [pulseaudio] alsa-sink.c: Selected mapping 'Analog Surround 4.0' (analog-surround-40). ( 0.097| 0.000) I: [pulseaudio] alsa-sink.c: Device doesn't support mmap(), falling back to UNIX read/write mode. ( 0.097| 0.000) I: [pulseaudio] alsa-sink.c: Cannot enable timer-based scheduling, falling back to sound IRQ scheduling. ( 0.106| 0.000) I: [alsa-sink-emu10k1] alsa-sink.c: Starting playback. ( 0.106| 0.000) I: [alsa-sink-emu10k1] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77) > > I read something about aplay and here are some additional command outputs ><a href="http://pastebin.com/33ybF6S4">http://pastebin.com/33ybF6S4</a> > > Post output of aplay --dump-hw-params -D surround40:CARD=Live any.wav Seem pulseaudio does not support MMAP_COMPLEX and fallback did not work as expected <a href="http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-November/022563.html">http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-November/022563.html</a> <a href="http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/profile-sets/default.conf">http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/profile-sets/default.conf</a> If device 0 of your ct4832 can pan stereo to both jacks and volume of rear jack is controlled by wave surround playback volume control The easy hack is to use hw instead of front for stereo if your green jack is not working [Mapping analog-stereo] -device-strings = front:%f hw:%f +device-strings = hw:%f channel-map = left,right The common problem of front jack fail to work is Pulseaudio does not ensure pcm playback switch is always ON Also try patch to force pcm playback switch to always ON <a href="https://bugs.freedesktop.org/attachment.cgi?id=10107">https://bugs.freedesktop.org/attachment.cgi?id=10107</a>