http://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/plain/Documentation/sound/alsa /HD-Audio.txt
trace hda_unsol_event only one event when headphone plugged and one event when headphone is plugged check whether you receive many plugged and unplugged events try trigger_sense=false Hint Strings ~~~~~~~~~~~~ The codec parser have several switches and adjustment knobs for matching better with the actual codec or device behavior. Many of them can be adjusted dynamically via "hints" strings as mentioned in the section above. For example, by passing `jack_detect = no` string via sysfs or a patch file, you can disable the jack detection, thus the codec parser will skip the features like auto-mute or mic auto-switch. As a boolean value, either `yes`, `no`, `true`, `false`, `1` or `0` can be passed. The generic parser supports the following hints: - trigger_sense (bool): indicates that the jack detection needs the explicit call of AC_VERB_SET_PIN_SENSE verb -- 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/1067434 Title: Sound output device keeps changing when using headphones Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: Recently upgraded to 12.10. Having issues with sound when using headphones plugged into the front ports. Something that doesn't happen when booting to windows - so fairly confident it's an Ubuntu issue. When listening to any sound, music, video etc the sound levels jump up and down and click. If I open "sound" from the settings menu when playing videos or music and viewing the "output" tab I can see "headphone - built-in audio disappear and reappear (very quickly) so I'm guessing the system is jumping back to the "analogue output" and back again which is why the sound volume changes and clicks. Worth noting I never used my headphones when 12.04 was installed so not sure if it's this OS or Ubuntu hates my hardware generally. Booted from live cd (usb) to 12.04 and there wasnt any issue. Anyone seen this before? any advice? Sound is built in to motherboard. I have the Gigabyte GA-X58A-UD5. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: gnome-control-center 1:3.4.2-0ubuntu19 ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5 Uname: Linux 3.5.0-17-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.6.1-0ubuntu3 Architecture: amd64 Date: Tue Oct 16 18:07:44 2012 EcryptfsInUse: Yes ExecutablePath: /usr/bin/gnome-control-center InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: gnome-control-center UpgradeStatus: Upgraded to quantal on 2012-09-29 (17 days ago) usr_lib_gnome-control-center: activity-log-manager-control-center 0.9.4-0ubuntu4 deja-dup 24.0-0ubuntu1 gnome-control-center-signon 0.0.18-0ubuntu1 indicator-datetime 12.10.2-0ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1067434/+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
