There has been an issue where Korora Xfce running in a VM using KVM was pausing for a short time. It seems I wasn’t the only one experiencing this issue. During a discussion on the Korora IRC channel I was experimenting with different settings and suggested a possible fix. It worked for me and others too. This may work for other distros too particularly Fedora and other Fedora remixes.
Thanks to bgstack15 for testing and documenting it, see his article here. But the short answer is to disable “Sync Drawing to the vertical blank”.
Techodyssey 