Qemu 2.12.1 is fine, suspicious commit is below: commit 280c1e1cdb24d80ecdfcdfc679ccc5e8ed7af45d Author: Gerd Hoffmann <kraxel@redhat.com> Date: Fri Jun 22 13:11:56 2018 +0200 audio/hda: create millisecond timers that handle IO Will run a git bisect tomorrow