It affects me as well, with the host being openSUSE Leap 15.0 with Intel graphics. (Guest is the aforementioned Lubuntu 18.04.) The workaround to switch TTYs (via right Ctrl+F1/F7) works.
It affects me as well, with the host being openSUSE Leap 15.0 with Intel graphics. (Guest is the aforementioned Lubuntu 18.04.) The workaround to switch TTYs (via right Ctrl+F1/F7) works.