Hi there! I'm new to the Ubuntu Mate and I have no experience with this system, so I installed Ubuntu Mate and my Grub2 menu have an option to load to the ArcoLInux (Arch based) but when I chose it then I can see black screen only, so I don't know how to fix it, help me please. Also, when use efibootmgr utility and use ArcoLinux's grub2 menu then I have no option to use Ubuntu Mate, only Ubuntu's grub able to watch Arco but does not load it.
PS. I use EFI system with Intel CPU and one HDD