Comment 3 for bug 1773390

Has there been any progress with this?

I am having a similar issue with Manjaro KDE as the host with Kernel 5.3.11 64 bit on an Intel i7-4790k with security mitigations disabled with mitigations=off as a grub option. I have had the issue copying text from a larger editor like Atom or VSCode (snap install code) to Konsole or to another file. This may actually causes the receiving app to freeze, like the console not to accept new text.

My guest is a Kubuntu 18.04.3 installation also with mitigations=off. I tried installing a newer kernel using Ukuu 5.3.12 which may have reduced the frequency?? I am not sure, but it did not solve the issue.

The guest KDE interface also seems to freeze as well. The taskbar that is typically at the bottom of the screen seems to become unresponsive. However, functionality like alt-tab seems to work. If I copy some other text or paste into something else, Konsole may unfreeze.

The copy and paste issue actually seems to break into the host KDE Manjaro system where KDE refuses to paste new text if I use VMs alot (open and stopping different vms for example). I was unable to reproduce this part of the issue, but it did happen.