On an Dell XPS 9360 with a 3200x1800 display it also defaults to 200% and I reliably reproduce this bug with the 18.04 final image.
I can confirm setting the scaling to 100% in the live session resolved the crash.
On an Dell XPS 9360 with a 3200x1800 display it also defaults to 200% and I reliably reproduce this bug with the 18.04 final image.
I can confirm setting the scaling to 100% in the live session resolved the crash.