I just tested karmik alpha-5.
The sound preferences dialog has a hardware "tab". There is an option:
"Settings for the selected device"
where the profile can be choosed. There are options for many the output
devices. Among them:
"Analog Surround 7.1 Output + Digital Stereo (IEC958)"
"Digital Stereo (HDMI) Output"
"Digital Stereo Duplex (IEC958)"
"Digitial Stereo (IEC958) Output + Digital Stereo (IEC958) Input"
I attach a capture from the dialog.
I think the IEC958 should be Surround 7.1, I tried speaker-test and it
fails for more than 2 channels:
"Digital Surround 7.1 (IEC958 7.1) Output"
aplay -L
front:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, ALC888 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
HDA Intel, ALC888 Digital
IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=Intel,DEV=0
HDA Intel, INTEL HDMI
HDMI Audio Output
$ speaker-test -Diec958 -c3 -twav
speaker-test 1.0.20
Playback device is iec958
Stream parameters are 48000Hz, S16_LE, 3 channels
WAV file(s)
Channels count (3) not available for playbacks: Invalid argument
Setting of hwparams failed: Invalid argument
** Attachment added: "screenshot gnome sound preferences, hardware"
http://launchpadlibrarian.net/31393027/screenshot_gnome_sound_preferences.png
--
Missing output devices in sound preferences dialog
https://bugs.launchpad.net/bugs/319281
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