I installed Linux Mint 22.3 alongside Windows 25H2 on an Omen 16 on a separate partition and have the boot loader on the same drive as Windows. Linux didn't appear in the F9 boot menu. I tried adding an EFI entry from Linux (attached terminal output) but it still doesn't appear. Secure Boot is disabled and Fast Startup is disabled.
This forum post suggests to add a custom boot entry, and that's what Gemini suggested at first, but I don't see any such option in my BIOS menu. It's probably obsolete now.
This question is about legacy and UEFI, my setup has UEFI for both OS's and my boot options work, just not convenient.
I can successfully use the "Boot from file" and select the linux EFI file, but that takes several extra keystrokes and a few extra seconds of attention.
Gemini suggested to go to Windows and point the Windows boot manager to Grub, from there I would have the option to go to either Windows or Linux, but I don't want to touch Windows' boot settings, just add another entry in the boot menu that I can control the boot order at.
I checked with EasyUEFI on patkim's suggestion, the boot order already includes an entry for linux in the NVRAM and it is already above Windows, yet it doesn't appear in the boot menu.
Question: How do I add a boot menu entry pointing to Grub?
sudo efibootmgr
Timeout: 5 seconds
BootOrder: 0001,9999,0000
Boot0000* Windows Boot Manager HD(1,GPT,6290cd4f-3ae7-48be-8f13-0259f1b01d8e,0x800,0x100000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)57494e444f #windows options string I removed#
Boot0001* Linux Boot Manager HD(1,GPT,a3ab8982-ede4-4edb-ae92-b1ce38991ed6,0x22,0x7fde)/File(\EFI\ubuntu\grubx64.efi)
Boot9999* USB Drive (UEFI) PciRoot(0x0)/Pci(0x1d,0x0)/USB(16,0)0000424f
