Though grub seems to install into the efi partition, for some reason its not getting added to the the list of boot options. My work around (at least for the nougat version) is to install vanilla AndroidX86 and then install the BlackSeraph version.
I can second that i have windows 10 and ubuntu as a duel boot on grub but android will not show on that menu do you know how to get it on there? i have to enter bios and shell commands grubx64.efi
Though grub seems to install into the efi partition, for some reason its not getting added to the the list of boot options. My work around (at least for the nougat version) is to install vanilla AndroidX86 and then install the BlackSeraph version.