Fix for Live USB boot in EFI mode (64 bits)

[zebul666]

hi.
So here is what I have used to sucessfully boot in EFI mode the Live USB key I have made. (The original boot did not worked at all. I had to boot in legacy BIOS mode)

Summary: We replace the broken syslinux boot with a grub EFI boot

TL;DR
Download and burn/use the efi patched kali iso

Step by step walkthrough to change Live USB

On the USB key, you have a second partition (ESP). Mount it if it is not already done
For example:

# mount /dev/sdc2 /mnt/kali

then

# cd /mnt/kali/EFI/BOOT
# rm -f *

We don't need any of the already existing file

then copy into that directory the following file BOOTX64.EFI

For the one not trusting that file, they can recreate it like I did on my Ubuntu 15.04 with this command:

# grub-mkstandalone -d /usr/lib/grub/x86_64-efi/ -O x86_64-efi --modules="part_gpt part_msdos iso9660 all_video efi_gop efi_uga video_bochs video_cirrus gfxterm gettext font" --fonts="unicode" --themes="" -o /mnt/kali/EFI/BOOT/BOOTX64.EFI --compress=gz "boot/grub/grub.cfg=/root/kali.cfg"

where the config file kali.cfg is the following:

# Config file for GRUB2 - The GNU GRand Unified Bootloader

set menu_color_normal=white/black
set menu_color_highlight=black/white

function load_video {
    if [ x$feature_all_video_module = xy ]; then
        insmod all_video
    else
        insmod efi_gop
        insmod efi_uga
        insmod video_bochs
        insmod video_cirrus
    fi
}

load_video
set gfxmode=auto
set gfxpayload=800x600

insmod font
font=unicode
loadfont $font

insmod gfxterm
insmod gettext

# Timeout for menu
set timeout=5

# Set default boot entry as Entry 0
set default=0
set color_normal=white/black

function find_root {
    insmod part_gpt
    insmod part_msdos
    insmod iso9660
    search --no-floppy --fs-uuid --set=root 2015-03-12-17-52-45-00
}

menuentry "Live (amd64)" {
    find_root
    linux /live/vmlinuz boot=live noconfig=sudo username=root hostname=kali
    initrd /live/initrd.img
}

menuentry "Live (amd64 failsafe)" {
    find_root
    linux /live/vmlinuz boot=live config memtest noapic noapm nodma nomce nolapic nomodeset nosmp nosplash vga=normal
    initrd /live/initrd.img
}

menuentry "Live USB Persistence              (check kali.org/prst)" {
    find_root
    linux /live/vmlinuz boot=live noconfig=sudo username=root hostname=kali persistence
    initrd /live/initrd.img
}

menuentry "Live USB Encrypted Persistence    (check kali.org/prst)" {
    find_root
    linux /live/vmlinuz boot=live persistent=cryptsetup persistence-encryption=luks noconfig=sudo username=root hostname=kali persistence
    initrd /live/initrd.img
}

menuentry "Live (forensic mode)" {
    find_root
    linux /live/vmlinuz boot=live noconfig=sudo username=root hostname=kali noswap noautomount
    initrd /live/initrd.img
}
#####
menuentry "Install" {
    find_root
    linux /install/vmlinuz vga=788 -- quiet
    initrd /install/initrd.gz
}

menuentry "Graphical Install" {
    find_root
    linux /install/gtk/vmlinuz video=vesa:ywrap,mtrr vga=788 -- quiet
    initrd /install/gtk/initrd.gz
}

menuentry "Install with speech synthesis" {
    find_root
    linux /install/gtk/vmlinuz video=vesa:ywrap,mtrr vga=788 speakup.synth=soft -- quiet
    initrd /install/gtk/initrd.gz
}

this file is an adaptation fo the boot file used by the original syslinux kali. If you don't use Ubuntu 15.04, you may have to make some adjustement to the grub-mkstandalone command above

Then

# umount /mnt/kali

And reboot!

TODO: Use a graphical background with the original splash.png