I have a small USB drive that I use to run elementary OS. I want to use this in multiple PC's so it can't have any specific configuration. The issue is that I like to use it on my work PC as although it has nice hardware, it still runs XP, and has so many dodgey chinese apps on it that it runs so slow and I don't trust the security. On this PC it boots fine as it has a legacy style BIOS so grub-pc works fine.
I also want to run it on my UEFI PC at home as Windows 8.1+ don't support my MIDI drums. The problem is that on my home PC I get a black screen unless I boot through recovery mode but this seems to disable GPU acceleration. I think the issue is related to it having grub-pc and not grub-uefi.
Is it possible to have GRUB UEFI and GRUB-PC installed at the same time?