I also have been experiencing this issue. Plugging earphones in didn't cause the speakers to mute and the microphone didn't record anything. The solution was to comment out the following line in /etc/modprobe.d /alsa-base.conf:
options snd-hda-intel model=lifebook -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/445889 Title: no sound from integrated speakers (Realtek ALC269, snd-hda-intel driver) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
