So using Qemu on Ubuntu didn't give the flashing ordeal like in VirtualBox, but it would seem that there are other issues such as keys stick and performance is atrocious.

I have not put an issue to Ubuntu just yet.

I was using the NVIDIA graphics driver. I switched the profile to an Intel based driver with X.Org X server drivers and still the same results. Can you let me know what video drivers PureOS supports?