Hello, thanks for reading, im currently building a triple boot computer with Recalbox,windows10 and ubuntu. I built a similar computer in the past with no problem, but instead of using recalbox i was using wifislax, so the way i did was, i started with wifislax to partition the hardrive, with space for the 3 systems, installed wifislax first , then windows, and at the end ubuntu, so tis would make ubuntu detect the first 2 systems and created the correct grub file or whatever it does, so i ended with a perfect 3 systems computer. I was trying to do the same, problem is ubuntu detectes the systems that are installed and creates a menu but only with windows and ubuntu only, it ignores the first os wich is recalbox.
On the first partition wich is for recalbox, i have a fat32 BOOT , a second one named RECALBOX wich is ext4 and cotains the file system, and a 3rd one wich is the share partition. On the first partition, BOOT there are 2 folders, one called boot and another called efi , on the boot one there are 1 folder and 2 files, the grub folder, and bzImage and initrd, and on the efi folder theres another boot folder with a bootx64.efi and a grub file, this is the content of the grub file.
set default="0" set timeout="0" menuentry "Recalbox" { linux /boot/bzImage label=RECALBOX console=tty3 quiet loglevel=0 initrd /boot/initrd.gz }
So i wonder if someone can help me out to convert this over to grub2 so i can modifyit before i install ubuntu, that way ubuntu will recogniseit, and if is posible to convert also to grub4dos so i can use it with other setup in the future.
Thanks in advance for any help.