Thank you very much!
100% worked! 
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For example this line:
initrd /boot/amd-ucode.img
It is missing the initramfs image! It should be something like this:
initrd /boot/intel-ucode.img /boot/initramfs-linux.img
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That is one of the problematic files. The other one is /usr/lib/linux-boot-probes/mounted/40grub2.
They both need to be fixed, otherwise grub-mkconfig does not work well.
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Is this an issue with all Linux OS?
Not all. The problem comes from how microcode is inserted to the system. Arch based distros use a separate microcode image file, e.g. amd-ucode.img in grub.cfg. Most other distros use other means.
Now grub-mkconfig by default does not support generating two parameters on the initrd line. That’s why the initramfs parameter is missing, and only the microcode image is there.
The grub-tools package fixes grub-mkconfig.
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Let’s change the title in Manuel’s theme and imagine Thor to be a Finnish Gentoo penguin.
Hail @manuel
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Ok i have another ssd & would like to install Linux Mint Debian Edition 4 onto it, so before i go forward with this and do a tri-boot i have 2 questions.
- Will it play nice with my Arch distros(ArcoLinux/EndeavourOS) in grub?
- Should I just stick with Arch based distros to dual/tri-boot?
Thanks everyone for all of your help.
You should do more research into the basics of Linux before attempting something that is obviously out of your range 
Asking for help on the forum assumes you have “done the work” 
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- Probably not out of the box. Doable yes, but a bit tricky.
- I’d recommend running Mint in a virtual machine. Much easier to set up. Works pretty well if you have plenty of RAM.
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I have 16gig with another 16 on the way, I’ll just install it in a virtual box.
Thanks!
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