I see this weird grey screen with a dark grey border every time I start my computer. It shows up before the login screen (or before the HDD decrypt screen if I chose to encrypt my drive).
It happens in Ubuntu Mate 16.04 and 15.10. It happens on my laptop and 2 desktops. It happens whether I install as Bios or UEFI. It happens whether or not I encrypt the HDD or home folder.
This grey screen does not show in Ubuntu, Xubuntu, Kubuntu, or Linux Mint Mate.
I checked the integrity of my 16.04 DVD and also extracted the ISO and checked the sha256 hash.
Is this grey screen normal?