There is two soundcards in your computer, once is the realtek ALC889 and the other is the Nvidia MCP77/78 HDMI for the digital out put. I to am wondering if the alsa divers are not picking the correct soundcard and cant see auto-mute function for the nvidia card and disregards the realtek one.
I did run a test and disabled the Nvidia card and the same issue applies no Auto-Mute. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/941219 Title: [Acer Aspire 8930G] Speaker Sound does not mute when Headphones are connected. Ubuntu 12.04 LTS. Missing Auto-Mute Mode in alsamixer. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/941219/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
