In my case helps the workaround by adding command listed bellow in the startup scripts just after pulse audio boot:
amixer -c 0 -- sset Side playback 100% unmute The command unmute the Side channel -- lenovo g460 [HDA-Intel - HDA Intel] mute softkey incorrect status https://bugs.launchpad.net/bugs/661952 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
