I can confirm that bug still exists in Linux Kernel 5.1.0. I created patch to fix this issue.
** Patch added: "fix_for_lenovo_b50-70_inverted_internal_microphone_bug.patch" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1524215/+attachment/5262687/+files/fix_for_lenovo_b50-70_inverted_internal_microphone_bug.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1524215 Title: Lenovo B50-70 inverted internal microphone To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1524215/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
