I solved to problem by changing my sound card option in the BIOS. There I find my front panel is using 'HD'. I change it to 'AC97' and after rebooting everything goes fine.
** Changed in: alsa-driver (Ubuntu) Assignee: (unassigned) => Mingxuan Ran (ranmx) ** Changed in: alsa-driver (Ubuntu) Status: New => Invalid -- 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/1611286 Title: No sound on front panel after upgrading from Ubunt 14.04 to Ubuntu 16.04 Status in alsa-driver package in Ubuntu: Invalid Bug description: After upgrading from Ubuntu 14.04 to 16.04, I lost the sound of headset on the front panel. However the back panel works well. The sound cards I have: 0 [HDMI ]: HDA-Intel - HDA ATI HDMI HDA ATI HDMI at 0xfeb44000 irq 42 1 [Generic ]: HDA-Intel - HD-Audio Generic HD-Audio Generic at 0xfeb40000 irq 16 The output table in the 'SOUND' setting window: Play sound through: Digital Output (S/PDIF) Built-in Audio In 'Test Sound' I can not hear anything. I am sure that the 'Mute' box is unchecked. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Uname: Linux 4.4.0-34-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: alfred 3740 F.... pulseaudio /dev/snd/controlC0: alfred 3740 F.... pulseaudio CurrentDesktop: Unity Date: Tue Aug 9 16:41:23 2016 PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic successful Symptom_Card: Built-in Audio - HD-Audio Generic Symptom_Jack: SPDIF Out, Internal Symptom_PulsePlaybackTest: PulseAudio playback test failed Symptom_Type: Only some of outputs are working Title: [System Product Name, Realtek ALC892, SPDIF Out, Internal] Playback problem UpgradeStatus: Upgraded to xenial on 2016-08-02 (6 days ago) dmi.bios.date: 05/08/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 6104 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: F2A85-V PRO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr6104:bd05/08/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnF2A85-VPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1611286/+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