I have noticed, when running processor-intensive apps such as Handbrake or FlightGear, that the inbuilt speakers become crackly but can often be restored by repeatedly activating the Test Sound Button.
Might I suggest that this is caused by a conflict of interrupts? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1414693 Title: Sound panel in System Settings fails to recognise built-in audio Status in unity-control-center package in Ubuntu: New Bug description: When the system starts up, the sound system sometimes fails to recognise the sound hardware correctly. One instance is where the System Settings > Sound window shows the Speakers, Built-in Audio in the Play Sound Through window but shows the settings for HDMI / Display Port instead. It is necessary to click on the Speakers in order to get the correct Settings for Speakers to be displayed. What the System Settings needs is a link to PulseAudio Volume Control which provides more options for selecting the various sound channels and options available e.g. Speakers, HDMI / Display Port or Bluetooth. This app is not necessarily known to the uninitiated. Perhaps some of its functionality needs to be included in the Sound window selected from System Settings. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: unity-control-center 14.10.0+14.10.20140922-0ubuntu2 ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3 Uname: Linux 3.16.0-30-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.1 Architecture: amd64 CurrentDesktop: Unity Date: Mon Jan 26 15:43:35 2015 ExecutablePath: /usr/bin/unity-control-center InstallationDate: Installed on 2014-12-11 (45 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) ProcEnviron: PATH=(custom, no user) LANGUAGE=en_GB:en XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: unity-control-center UpgradeStatus: Upgraded to utopic on 2014-12-11 (45 days ago) usr_lib_unity-control-center: deja-dup 32.0-0ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1414693/+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
