Can I install in UEFI mode with the alternate installer?
30,770
I figured it out, so for those who are interested, here's how to do it:
After the installation, reboot the computer into a live CD or any Linux CD that can mount the hard drive partitions. Then, do the following: (replace #
with appropriate partition numbers)
### Mounting ###
sudo mount /dev/sda# /mnt #Mount root (/) partition
sudo mount /dev/sda# /mnt/boot #Mount boot (/boot) partition
(if separate from root partition)
sudo mkdir -p /mnt/boot/efi #Create EFI partition mount point
sudo mount /dev/sda1 /mnt/boot/efi #Mount EFI partition
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt #Chroot to your installation
### Installing ###
apt-get install grub-efi-amd64 #Install grub EFI bootloader
grub-install --recheck --no-floppy --force
#Install grub bootloader in EFI partition
echo "configfile (hd0,gpt#)/boot/grub.cfg" > /boot/efi/ubuntu/grub.cfg
#Tell grub to load grub.cfg from /boot
update-grub #Create grub menu list
exit #Exit chroot
### Unmounting ###
sudo umount /mnt/dev
sudo umount /mnt/proc
sudo umount /mnt/sys
sudo umount /mnt/boot/efi
sudo umount /mnt/boot
sudo umount /mnt
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Author by
Andrew Gunnerson
Updated on September 18, 2022Comments
-
Andrew Gunnerson over 1 year
I'm wondering if it's possible to install Ubuntu 11.04 UEFI mode with the alternate installer. I've read that only
grub-efi
is needed to boot in UEFI mode. How do I install that? -
Lekensteyn over 12 years
sudo
is redundant withsudo chroot
. Also, it seems thatgrub-install
is invoked in the post installation scrupt ofgrub-efi-amd64
as well. I couldn't get this working, the system (desktop with Gigabyte GA-Z68X-UD3H) stops after the boot menu without selecting an OS. Did you perform additional steps? Edit: I don't have a/sys/firmware/efi
directory -
Lekensteyn over 12 yearsOkay, it turns out that the mobo with Award BIOS does not have "real" EFI support. What a shame.. techreport.com/discussions.x/20941
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Andrew Gunnerson about 12 yearsThanks! I've removed sudo from the commands run in the chroot. Sorry for the delay :( There must be some way to have Ask Ubuntu send emails for comments.
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Mark Tomlin about 11 yearsFirst off thank you for this, I'm having some what of the same problem with 12.10 throwing me to the grub prompt on reboot every time. Pretty sure this is because I'm booting from a UEFI board.
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sancho.s ReinstateMonicaCellio over 2 yearsWhen you say ¨After the installation, reboot the computer into a live CD or any Linux CD...¨, is that booting in legacy (CSM) mode? Or UEFI mode?