http://www.idt.com/products/audio-products/high-definition-hd-audio- codecs/92hd91b-single-chip-pc-audio-system-codec-speaker-amplifier- capless-hp-ldo
if you look at the block diagram , the mono pin has band pass filter and stereo to mono mix for the subwoofer -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1206015 Title: No sound on kernel 3.10.3 Status in “alsa-driver” package in Ubuntu: New Bug description: its working fine on 3.8.0.26 but its not working on 3.10.3, how i can solve this problem ? ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: alsa-base 1.0.25+dfsg-0ubuntu4 Uname: Linux 3.10.3-031003-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.9.2-0ubuntu8.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bahaa 2350 F.... pulseaudio bahaa 3878 F.... alsamixer /dev/snd/pcmC0D0p: bahaa 2350 F...m pulseaudio Date: Mon Jul 29 09:55:01 2013 InstallationDate: Installed on 2013-07-28 (0 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True PackageArchitecture: all SourcePackage: alsa-driver UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/11/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A13 dmi.board.name: 04M3YM dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA13:bd03/11/2013:svnDellInc.:pnInspiron7720:pvr:rvnDellInc.:rn04M3YM:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Inspiron 7720 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1206015/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp