Just stating here that it currently affects 18.04 and 19.04 as guests on
Vbox 6 on Macos (Mac Pro 2018).
Flickering white screen happens only with Wayland and not X.
X works fine.
Guest additions installed as well.
VBox extensions installed as well.
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I've got the same problem. Everything is showing with blue tint.
I followed the instructions above and ran "$ xprop -root | grep
ICC_PROFILE" and it indeed had a profile.
Looking at System Settings > Device Colour Profiles; both my monitors
had a profile each. I used the remove option.
