@Hui Wang Thanks, here is my new alsa-info.txt. Unfortunately, my internal mic still doesn't work.
** Attachment added: "alsa-info.txt.69pNmVM83Q" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1523100/+attachment/5281774/+files/alsa-info.txt.69pNmVM83Q -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1523100 Title: Alsa not detecting internal microphone [ALC255] (Realtek) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1523100/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs