https://cgit.freedesktop.org/xorg/driver/xf86-video-qxl 0001-Remove-unused-variables.patch ... 0036-spiceqxl_audio-Stop-the-playback-channel-if-there-is.patch 36 patches queueing from the last xf86-video-qxl release - 0.1.4, dates from 2015-04-02 - over a year. Perhaps the time is right for a next release.