Adding
disable-lfe-remixing = no
fixes problem for me too on Karmic & pulseaudio 0.9.21-0ubuntu3~~karmic~ubuntuaudiodev1 & alsa-base 1.0.20+dfsg-1ubuntu5
Before this I didn't hear anything from my subwoofer (LFE), like in 5.0 configuration. When I change pulseaudio to anything else (2.0) and back to 5.1, I head my LFE, but not so long, after some time it was turning off...
Adding lfe-remixing = no 0ubuntu3~ ~karmic~ ubuntuaudiodev1 & alsa-base 1.0.20+ dfsg-1ubuntu5
disable-
fixes problem for me too on Karmic & pulseaudio 0.9.21-
Before this I didn't hear anything from my subwoofer (LFE), like in 5.0 configuration. When I change pulseaudio to anything else (2.0) and back to 5.1, I head my LFE, but not so long, after some time it was turning off...