Hi, I'm resending this mail as I have previously sent it from an unregistered address and I'm not sure it got through, so apologies if this appears as a duplicate. I have an Asus Nvidia GeForce 210 graphics card and am using the HDMI cable connected to my TV ( which itself connects to the surround sound unit ). I've only managed to get this to work with the stereo output. If I use any of the 5.1 options it's just silent ( although the signal monitor in paman goes crazy as though it should be making noise ). Also when I use speaker-test -c 6 on two of the outputs it goes through all 6 speakers and seems to be working, but it is silent. My other TV inputs work find with surround sound as far as I am able to determine. Any ideas? Here's the output of aplay -L: $ aplay -L null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server default Playback/recording through the PulseAudio sound server hdmi:CARD=NVidia,DEV=0 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=1 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=2 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 HDMI Audio Output dmix:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct sample mixing device dsnoop:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct sample snooping device hw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct hardware device without any conversions plughw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Hardware device with all software conversions $ dmesg | grep HDMI [ 19.320139] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:03.0/0000:02:00.1/sound/card0/input5 [ 19.320259] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/0000:02:00.1/sound/card0/input6 [ 19.320354] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/0000:02:00.1/sound/card0/input7 [ 19.320467] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/0000:02:00.1/sound/card0/input8 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20121202/1d420f0a/attachment.html>