Actually, I found a workaround for this (apologies if it has already
been pointed out):
1. Install pulseaudio-utils:
apt-get install pulseaudio-utils
2. Run `pacmd`.
pacmd
3. Now find the offending sound card via `list-cards` (in pulseaudio's
interactive command line):
list-cards
4. Now set the desired profile of the card (my card was at index 2, its
long name was `USB Sound Device at usb-0000:06:00.0-1, full speed`).
set-card-profile 2 output:analog-surround-51
Btw, Fedora 17 had this 'profile selection' in the Gnome's Sound
Preferences UI. In Fedora it worked out of the box.
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https://bugs.launchpad.net/bugs/535476
Title:
CM106 usb sound card incorrectly detected as stereo only
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