see also https://bugs.launchpad.net/ubuntu/+source/alsa-utils/+bug/1536143 and https://bugs.launchpad.net/ubuntu/+source/alsa-tools/+bug/1536141
see also https:/ /bugs.launchpad .net/ubuntu/ +source/ alsa-utils/ +bug/1536143 and https:/ /bugs.launchpad .net/ubuntu/ +source/ alsa-tools/ +bug/1536141