I start up my VM of the newest 18.04 LTS-Version. From time to time the start-screen does not disappear like usual.
The image shown below overlaps all other windows, every time it updates (a point changes the color). It mostly disappears on the next reboot.
How can I get rid of it and is this a bug worth reporting?
EDIT: On startup, the dots are not displayed correct. They are spread pixel-line by pixel-line over the top edge of the boot screen.