Posts by jkovacs

Mydriaze did you check Windows 10 dual boot with UEFI ? It shows a quite easy way for dual boot.

quicktrick if you followed the above steps all you need to do is to

- set the extra partition labels (only need to add GRUB and Windows as other are already there) to ignore under .config/udev.rules.d/95-udevil-mount.rules, e.g.:

ENV{ID_FS_LABEL}=="EFI|BOOT|Recovery|RECOVERY|SETTINGS|boot|root0|share0|GRUB|Windows", GOTO="exit"

- double check if the partition labels are correct, e.g.:

        /dev/sda1 Recovery
        /dev/sda2 EFI
        /dev/sda3 
        /dev/sda4 Windows
        /dev/sda5 GRUB
        /dev/sda6 BOOT
        /dev/sda7 STORAGE

Note: I had issues adding the label to the EFI (/dev/sda2) partition with GParted, but worked with mlabel from the terminal under Ubuntu Live:

mlabel -i /dev/sda2 ::EFI

Regarding the 'grub-install' command: yes, for Grub, both the boot and efi are the same /dev/sda5 (decoupled from both windows and libreelec). /dev/sda6 is only a boot for libreelec.

R, Janos

That old plugin is not available for download anymore...

...so started to create my own addon. I was about to test when realized that even with the extra tools there is no grub-* in libreelec

...but the good thing is that there is efibootmgr which also supports one-time-only boot changes!

The only drawback is that it can boot partition that is know by EFI.

Thanks camyoung11 !

That's super helpful - although I'll have to extend a bit with explicitly mounting the boot partition as

- I prefer to hide all the non-content partitions from LibreElec

- As shown above, I have grub on the EFI partition which is hidden by default on LibreElec.

Janos

I mentioned EFI as I think it's easier, but basically MBR could also work.

Does your NUC support EFI?

Do you know what partitions would be needed for Volumio? Does it boot via syslinux like LibreElec?

Hi Balazs,

I didn't even hear about Volumio before but basically you need a bootloader like grub and manually placing the content on the partitions...

On high level:

• Get a linux live system - e.g. Ubuntu Live on USB - that has grub2 and UEFI support
• Set UEFI and boot the live system
• With GParted create the required partitions:
  • one fat32 ~100M for EFI (boot,efs)
  • two for LibreElec (e.g. one ext3 for boot and another, ext4 for storage, as large as you need
  • other partitions as Volumio requires
• Update your live system and add grub-efi-amd64
• Install grub into the first partition
• Create your grub config for both LibreElec and Volumio
• Copy required content on the target partitions for both libreelec and volumio
• Enjoy!

R, Janos

Hi Michael,

Check out this: Windows 10 dual boot with UEFI

R, Janos

Hi,

NUC NUC7i5BNH, Windows 10, LibreELEC, Dual boot, UEFI, Grub2

I just want to share the steps I used to set up dual boot. All you need is Ubuntu Live on bootable USB, no need to use any extra tools on windows or hack the EFI stuff.

Next step would be to create

• a simple win10 app and

• a simple LibreElec plugin

to set next-time-default-boot-entry, but if your (remote) keyboard works at boot time, you can easily select which OS to boot...

R, Janos

Note: all these are typed in w/o copy&pasting so expect typos!

1. Install Win10 in UEFI mode

First install Windows 10. Make sure you boot in UEFI mode to do the install. Let windows create all the extra partitions but make sure you leave enough space behind for LibreELEC:

Partitions created:
/dev/sda1 NTFS      Recovery      500MB hidden,diag
/dev/sda2 FAT32     EFI system    100MB boot,esp
/dev/sda3 unknown   MS Reserved    16MB msftres
/dev/sda4 NTFS      Windows       120GB msftdata

<leave enough unused space behind for LibreElec: ~8-16G>

2. Boot Ubuntu 18.04 Live in UEFI mode

Everything you have to do in a terminal must be with root! - so always start with:

sudo su

2.a. Use GParted and create extra partitions for LibreELEC

/dev/sda5   FAT32   Grub Boot Manager       100MB   Label=GRUB
/dev/sda6   EXT3    LibreElec Boot         1024MB   Label=BOOT
/dev/sda7   EXT4    LibreElec Storage        16GB   Label=STORAGE

Note: set the LibreElec Storage size to what fits for you

3. Copy LibreElec to target file-system

- As usual, create an USB boot drive

- Plug-in the USB drive while still in Ubuntu Live

- USB drive should auto-mount under /media/ubuntu/LIBREELEC

- Copy two files to the LibreElec boot partition

mkdir /mnt/sda6
mount /dev/sda6 /mnt/sda6
cp /media/ubuntu/LIBREELEC/KERNEL /mnt/sda6/
cp /media/ubuntu/LIBREELEC/SYSTEM /mnt/sda6/
umount /mnt/sda6

4. Configure UEFI

4.a. Update the live session to get latest grub2 and tools

apt-get update
apt-get upgrade
apt-get install grub-efi-amd64

4.b. Install Grub2

# mount the target partition
sudo su
mkdir /mnt/sda5
mount /dev/sda5 /mnt/sda5

# install grub2 to EFI
grub-install --target=x86_64-efi --bootloader-id=LibreElec --boot-directory=/mnt/sda5 --efi-directory=/mnt/sda5

# check that libreElec is the new default
efibootmgr -v

4.c. Create grub config files

The grub-efi configuration

cat << EOF > /mnt/sda5/EFI/LibreElec/grub.cfg
configfile /grub/grub.cfg
EOF

The grub-menu configuration:

cat << EOF > /mnt/sda5/grub/grub.cfg
set default=0
set timeout=5

insmod efi_gop
insmod efi_uga
insmod font

loadfont /grub/fonts/unicode.pf2

menuentry "LibreElec" {
  insmod part_gpt
  insmod ext2
  set root='hd0,gpt6'
  linux /KERNEL boot=/dev/sda6 disk=/dev/sda7 quiet
}

menuentry "Microsoft Windows x86_64 UEFI-GPT" {
  insmod part_gpt
  insmod fat
  insmod chain
  set root='hd0,gpt2'
  chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
EOF

4.d. Clean up and reboot

umount /mnt/sda5
reboot

Optional steps:

- if you want to use UUID instead of fixed partitions:

2.b. Record what UUIDs are there for the following partitions (e.g. from GParted, using information on the partitions):

- /dev/sda2 - the EFI partition

- /dev/sda6 - the LibreElec boot partition

- /dev/sda7 - the LibreElec storage partition

4.c. Use the below menu-entries in the grub/grub.cfg:

menuentry "LibreElec" {
  # boot:  /dev/sda6  UUID: ABCD-EFGH-JKLM-1234
  # stor:  /dev/sda7  UUID: 1234-DCBA-8765-MLKJ
  insmod part_gpt
  insmod ext2
  insmod search_fs_uuid
  set root='hd0,gpt6'
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 ABCD-EFGH-JKLM-1234
  else 
    search --no-floppy --fs-uuid --set=root ABCD-EFGH-JKLM-1234
  fi
  linux /KERNEL boot=UUID=ABCD-EFGH-JKLM-1234 disk=UUID=1234-DCBA-8765-MLKJ quiet
}

menuentry "Microsoft Windows x86_64 UEFI-GPT" {
  # EFI:  /dev/sda2  UUID: QWER-9876
  insmod part_gpt
  insmod fat
  insmod search_fs_uuid
  insmod chain
  set root='hd0,gpt2'
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 QWER-9876
  else 
    search --no-floppy --fs-uuid --set=root QWER-9876
  fi
  chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}