I can confirm that using QasMixer to adjust the configuration settings fixes the incorrect default configuration. It looks like Ubuntu configuration ships by default to send audio on this sound card to the front ports (if they exist), rather than the rear ports (that always exist), and then does not provide a clear path to the relevant configuration setting. Installing QasMixer allows easy GUI access to the necessary configuration settings.
This is just my intuition, but it appears to be a bug within the default "Sound" panel under "Settings": the Input tab correctly lists both the back and front panel microphones, but the Output tab only lists the back panel speakers (which actually aren't the back panel speaker jacks, but instead sends the audio to the front panel jack, as revealed by QasMixer). I may be entirely incorrect, perhaps it's a driver issue! Hope that helps someone? If I knew anything about programming, I'd take things apart and look myself. Since I don't, I figure I'd add as much detail as I could imagine would be useful in order to help someone else get up to speed on the issue. If anyone has any questions or problems, I've subscribed to this bug report and will (eventually) respond to requests for more information. ** Attachment added: "QasMixer displaying the relevant settings" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1385770/+attachment/4275520/+files/Screenshot%20from%202014-12-06%2019%3A54%3A42.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1385770 Title: [CMI8786 - Xonar DG, playback] No sound at all Status in alsa-driver package in Ubuntu: Confirmed Bug description: Since I upgraded to UBUNTU 14.10, I finally had to reinstall ubuntu for half actualiazción error, the computer has been moved. Appear either audio controls on the system configuration, but no sound. Found that: is using the sound card (Asus Xonar) and not the motherboard, so it appears in Sound settings. the speakers are on and in correct volumes. In windows (another partition) still works And the fact is that they do not try to touch or configuration. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4 Uname: Linux 3.16.0-23-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: rafa 1683 F...m pulseaudio /dev/snd/controlC0: rafa 1683 F.... pulseaudio CurrentDesktop: Unity Date: Sun Oct 26 00:38:26 2014 InstallationDate: Installed on 2014-10-24 (1 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) PackageArchitecture: all ProcEnviron: LANGUAGE=es PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=es_ES.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:DG failed Symptom_Card: CMI8788 [Oxygen HD Audio] (CMI8786 (Xonar DG)) - Xonar DG Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: rafa 1683 F...m pulseaudio /dev/snd/controlC0: rafa 1683 F.... pulseaudio Symptom_Type: No sound at all Title: [CMI8786 - Xonar DG, playback] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/16/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.50 dmi.board.name: G41M-S3 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd05/16/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnG41M-S3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1385770/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp