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UEFI
UEFI boot loader does not show up in firmware menu
On some UEFI motherboards like boards with an Intel Z77 chipset, adding entries with efibootmgr or bcfg from the EFI Shell will not work because they do not show up on the boot menu list after being added to NVRAM.
This issue is caused because the motherboards can only load Microsoft Windows. To solve this you have to place the .efi file in the location that Windows uses.
Copy the bootx64.efi file from the Arch Linux installation medium (FSO:) to the Microsoft directory your ESP partition on your hard drive (FS1:). Do this by booting into EFI shell and typing:
FS1: cd EFI mkdir Microsoft cd Microsoft mkdir Boot cp FS0:\EFI\BOOT\bootx64.efi FS1:\EFI\Microsoft\Boot\bootmgfw.efi
change boot order
# show efibootmgr # change efibootmgr -o 1,0
force ubuntu on ACER bad
mv EFI/Microsoft/Boot/bootmgfw.efi EFI/Microsoft/Boot/bootmgfw.efi.backup cp EFI/ubuntu/grubx64.efi EFI/Microsoft/Boot/bootmgfw.efi
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grub legacy
root@sysresccd:/# parted /dev/sda print Model: ATA ST500LT012-9WS14 (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 524MB 523MB ntfs Basic data partition hidden, diag 2 524MB 839MB 315MB fat32 EFI system partition boot 3 839MB 973MB 134MB Microsoft reserved partition msftres
parted /dev/sda set 1 bios_grub on