This solution worked for me: Edit the file /etc/modprobe.d/alsa-base and add "options snd-hda-intel model=laptop" to a new line.
-- mute internal speakers when headphones/externel speakers are connected https://bugs.launchpad.net/bugs/129907 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
