Problem with dual booting mint and manjaro

[megavolt]

@Jos2210

then install Linux Mint on separate partition

And that is a problem. Mint’s grub cannot boot Manjaro’s modified grub. If it is a EFI Installation, then choose Manjaro at the BIOS/UEFI. Manjaro’s grub can boot Mint’s grub well, since backwards compatibility.

So in short: Mint’s grub cannot boot Manjaro’s grub, because it is 1. modfied and 2. has a higher version.

@linux-aarhus

When your system doesn’t recognize Manjaro - then you have a system supporting EFI but prioritising MBR boot - thus your Mint is MBR and Manjaro is EFI - which is entirely possible but you cannot mix the two into a bootloader menu.