Por que o XBMC não está reproduzindo áudio da porta HDMI?

Question

Eu tenho a seguinte configuração:

• Ubuntu 14.04 Server
• Drivers de vídeo mais recentes da Nvidia
• ALSA instalado
• PulseAudio NÃO instalado
• XBMC 13.1 Gotham instalado

O problema:

executar speaker-test -c2 -D plughw:1,7 produz som por meio da saída HDMI, como esperado, e o log do XBMC sugere que a placa foi detectada, mas ainda não estou recebendo som no XBMC.

Informações Relevantes

• A saída de id é uid=1000(louist) gid=1000(louist) groups=1000(louist),4(adm),20(dialout),24(cdrom),27(sudo),29(audio),30(dip),44(video),46(plugdev),100(users),110(lpadmin),111(sambashare) , então sou no grupo audio .
• Eu verifiquei alsamixer e os S / PDIFs estão todos ativos em ambos os dispositivos de áudio.
• O dispositivo selecionado no xbmc é chamado Default (HDA NVidia HDMI 0) .

aplay -l

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: VT1708BCE Analog [VT1708BCE Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: VT1708BCE Digital [VT1708BCE Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 2: VT1708BCE Alt Analog [VT1708BCE Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

aplay -L

$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
sysdefault:CARD=Intel
    HDA Intel, VT1708BCE Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Digital
    IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    Direct sample mixing device
dmix:CARD=Intel,DEV=1
    HDA Intel, VT1708BCE Digital
    Direct sample mixing device
dmix:CARD=Intel,DEV=2
    HDA Intel, VT1708BCE Alt Analog
    Direct sample mixing device
dsnoop:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    Direct sample snooping device
dsnoop:CARD=Intel,DEV=1
    HDA Intel, VT1708BCE Digital
    Direct sample snooping device
dsnoop:CARD=Intel,DEV=2
    HDA Intel, VT1708BCE Alt Analog
    Direct sample snooping device
hw:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    Direct hardware device without any conversions
hw:CARD=Intel,DEV=1
    HDA Intel, VT1708BCE Digital
    Direct hardware device without any conversions
hw:CARD=Intel,DEV=2
    HDA Intel, VT1708BCE Alt Analog
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, VT1708BCE Analog
    Hardware device with all software conversions
plughw:CARD=Intel,DEV=1
    HDA Intel, VT1708BCE Digital
    Hardware device with all software conversions
plughw:CARD=Intel,DEV=2
    HDA Intel, VT1708BCE Alt Analog
    Hardware device with all software conversions
hdmi:CARD=NVidia,DEV=0
    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 1
    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 1
    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 1
    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 1
    Hardware device with all software conversions

xbmc.log

• link

dmesg

• link

Alguém sabe como posso remediar este problema?