Instalei o Ubuntu 12.04.5 no laptop ( lenovo g4070 59417454 ) com o Windows 8.1 existente. Mas quando seleciono o Windows 8.1 no menu do grub:
error: unknown command 'drivemap'
error: invalid EFI file path.
BIOS:
Boot Mode: UEFI
EFI:
ubuntu (WDC WD5000LPCX-24C6HTO)
Windows Boot Manager
ubuntu (WDC WD5000LPCX-24C6HTO)
Não faço ideia do porque eu tenho 2 opções do Ubuntu. Talvez depois que eu usei Boot Repair .
Usando a segunda opção EFI (Gerenciador de inicialização do Windows), ele será inicializado com êxito no Windows 8.1.
Usando a 3ª opção, ele irá para o prompt do grub.
Teste UEFI:
cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda11 during installation
UUID=a83b92ee-6243-4fd8-9008-17c05ef8715e / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda2 during installation
#UUID=C0A6-125C /boot/efi vfat defaults 0 1
# /home was on /dev/sda10 during installation
UUID=bb008f49-2160-43d6-9ee2-84023072b571 /home ext4 defaults 0 2
# swap was on /dev/sda9 during installation
UUID=d7de343e-1cad-446a-b7ba-355414132816 none swap sw 0 0
UUID=C0A6-125C /boot/efi vfat defaults 0 1
Teste UEFI:
[ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD"
EFI boot on HDD
Kernel:
uname -r
3.16.0-031600-generic
Registro de reparo de inicialização:
paste.ubuntu.com/10532939
Adicione isso a 40_custom.
gksudo gedit /etc/grub.d/40_custom
sudo update-grub
menuentry "Windows 8 UEFI" {
insmod part_gpt
insmod fat
insmod search_fs_uuid
insmod chain
set root='(hd0,gpt2)'
search --fs-uuid --no-floppy --set=root C0A6-125C
chainloader (${root})/efi/Microsoft/Boot/bootmgfw.efi
}