do you mean surround21 does not work as expected https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1286021
you may need to follow up with the author how to perform test -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1316305 Title: Externa subwoofer asus sonicmaster doesn't work on Asus ux51vz To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1316305/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs