Ok so I just installed Debian because I like to hop around distributions every now and again. So anyway I can get to the part where I just finished the installation and reboot; everything loads fine and exactly like expected. I start customization and then decide to reboot to just everything works still. But this time when I boot my screen reads "Reboot and select proper Boot device
or Insert Boot Media in selected Boot device and press a key"
I've done this stuff before and it has worked so whats wrong? I've tried reinstalling GRUB through "rescue mode" on the installation media - didn't work. I have also tried reinstalling the entire OS (I didn't mind because I hadn't done much on the installation.) Same outcome.
Is there something I'm doing wrong? Oh and keep in mind I am dual booting Kali as well.

Thanks.

Sounds like a brain-dead BIOS that believes M$oft rules the world. Do you have a partition (only one of course) marked as "boot" ?.

Yeah that's what I think too as this Toshiba Satellite had Win10 installed initially. But no I have an EFI partition as that's what I usually do. Do I need a BIOS partition for Debian or what? Also thanks for the fast reply

No, ignore me if UEFI ....
I've had that happen on BIOS systems - was a while ago tho'.

There are rumours that some UEFI firmware will only boot a specific (M$oft) named module. I would well believe it of Toshiba.

Ok lmao. Any suggestions?

Actually I'm gonna test putting in a /boot partition as when i bought it it said UEFI however the interface looks likea goddamn 2005 games console interface. I'll report back with the results.

what is on your efi partition? You might have to create an EFI/BOOT on your efi paritition and copy the debian grubx64.efi, that should be somewhere on your efi partition, to the EFI/BOOT and rename it bootx64.efi

A File tree that looks like this EFI -> debian -> grubx64.efi

How would I do this?

as root

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Thanks dude, this worked like a charm!

Your Welcome