Hi,

I have a ACER Aspire REVO with NVIDIA ION, running Ubuntu Karmic Kaola, with pulseaudio installed.
It is connected to a Denon AV Receiver via HDMI. My problem is that i have only stereo sound output over HDMI.
It is possible to get surround working over HDMI ? Do I have to look into alsa to get this working or is this a pulseaudio issue ?

thanks in advance for you insights !

koen@revo:~$ aplay -L
front:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    Front speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, ALC662 rev1 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=NVidia,DEV=0
    HDA NVidia, NVIDIA HDMI
    HDMI Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    Playback/recording through the PulseAudio sound server

ALSA Audio Debug v0.1.0 - Fri Feb 26 12:13:30 CET 2010
http://alsa.opensrc.org/aadebug
http://www.gnu.org/licenses/gpl.txt

Kernel ----------------------------------------------------
Linux revo 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 i686 GNU/Linux

Loaded Modules --------------------------------------------
snd_hda_codec_nvhdmi     4828  1 
snd_hda_codec_realtek   203328  1 
snd_hda_intel          26920  1 
snd_hda_codec          75708  3 snd_hda_codec_nvhdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep               7200  1 snd_hda_codec
snd_pcm_oss            37920  0 
snd_mixer_oss          16028  1 snd_pcm_oss
snd_pcm                75296  3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_dummy           2656  0 
snd_seq_oss            28576  0 
snd_seq_midi            6432  0 
snd_rawmidi            22208  1 snd_seq_midi
snd_seq_midi_event      6940  2 snd_seq_oss,snd_seq_midi
snd_seq                50224  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              22276  2 snd_pcm,snd_seq
snd_seq_device          6920  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd                    59204  14 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
snd_page_alloc          9156  2 snd_hda_intel,snd_pcm

Modprobe Conf ---------------------------------------------
Warning: module config file does not exist
This means any kernel modules will not be auto loaded
See your linux distro docs on how to create this file

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.20.
 0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfae78000 irq 21
  2:        : timer
  3:        : sequencer
  4: [ 0- 3]: digital audio playback
  5: [ 0- 0]: digital audio playback
  6: [ 0- 0]: digital audio capture
  7: [ 0- 3]: hardware dependent
  8: [ 0- 0]: hardware dependent
  9: [ 0]   : control
00-03: HDA Codec 3
00-00: HDA Codec 0
00-00: ALC662 rev1 Analog : ALC662 rev1 Analog : playback 1 : capture 1
00-03: NVIDIA HDMI : NVIDIA HDMI : playback 1
Client info
  cur  clients : 3
  peak clients : 3
  max  clients : 192

Client   0 : "System" [Kernel]
  Port   0 : "Timer" (Rwe-)
  Port   1 : "Announce" (R-e-)
    Connecting To: 15:0
Client  14 : "Midi Through" [Kernel]
  Port   0 : "Midi Through Port-0" (RWe-)
Client  15 : "OSS sequencer" [Kernel]
  Port   0 : "Receiver" (-we-)
    Connected From: 0:1

Dev Snd ---------------------------------------------------
by-path  controlC0  hwC0D0  hwC0D3  pcmC0D0c  pcmC0D0p pcmC0D3p  seq  timer

CPU -------------------------------------------------------
model name : Intel(R) Atom(TM) CPU  230   @ 1.60GHz
cpu MHz : 1599.929
model name : Intel(R) Atom(TM) CPU  230   @ 1.60GHz
cpu MHz : 1599.929

RAM -------------------------------------------------------
MemTotal:        1802424 kB
SwapTotal:       5277312 kB

Hardware --------------------------------------------------
00:00.0 Host bridge: nVidia Corporation MCP79 Host Bridge (rev b1)