Comment 7 for bug 1173457

Dylan Taft (dylanetaft) wrote :

I managed to clean up the damage
I used efibootmgr to delete the EFI boot entries on the Windows drive

I then booted an Ubuntu USB stick, followed Gentoo's guide for mounting and chrooting into the Ubuntu environment I needed to fix
https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Base

I then did grub-install --target=x86_64-efi --efi-directory=/boot/efi, where /boot/efi had my external drive's EFI partition mounted up
https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Bootloader

I checked the drive with efibootmgr to make sure Grub installed right, it did.

This is a really critical bug for any desktop user...