Public bug reported: Not sure exactly which version upgrade broke the output auto-mute, as I infrequently used the headphones for sometime. However, I do know that originally it did work. Also, I've established the problem is not hardware. When I connect a HDD with Windows and boot, the auto-mute works just fine when I connect the headphones.
ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: alsa-base 1.0.25+dfsg-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: wbrown 2621 F.... pulseaudio /dev/snd/pcmC0D0p: wbrown 2621 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf7fdc000 irq 51' Mixer name : 'Analog Devices AD1984A' Components : 'HDA:11d4194a,10280420,00100400' Controls : 34 Simple ctrls : 20 Date: Tue May 15 15:01:10 2012 InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1) PackageArchitecture: all ProcEnviron: TERM=xterm PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_Card: Built-in Audio - HDA Intel Symptom_Jack: Green Headphone Out, Front Symptom_Type: No auto-mute between outputs Title: [OptiPlex 780, Analog Devices AD1984A, Green Headphone Out, Front] No automute UpgradeStatus: Upgraded to precise on 2012-04-27 (17 days ago) dmi.bios.date: 12/09/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 0C27VV dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA12:bd12/09/2011:svnDellInc.:pnOptiPlex780:pvr:rvnDellInc.:rn0C27VV:rvrA01:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 780 dmi.sys.vendor: Dell Inc. ** Affects: alsa-driver (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/999878 Title: [OptiPlex 780, Analog Devices AD1984A, Green Headphone Out, Front] No automute To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/999878/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs