It's another hardware but happened something similar. Actually it had been buzzing before I killed pulseaudio. I will upload the log if it happens on the other device, but I am not sure whether it has anything to do with volume-changing.
** Attachment added: "pulseverbose.log" https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1252804/+attachment/3914408/+files/pulseverbose.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1252804 Title: Sound repeat unexpectedly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1252804/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
