I always see this grey screen for 2-3 sec at starting (after BIOS appears). I have two Ubuntu MATE 15.10 installations (netbook and desktop pc) and both are booting with grey screens. I think it's no bug....
I always see this grey screen for 2-3 sec at starting (after BIOS appears). I have two Ubuntu MATE 15.10 installations (netbook and desktop pc) and both are booting with grey screens. I think it's no bug....