Как на Funtoo настроить Grub ?

# ls /boot
System.map-debian-sources-x86_64-4.14.12-2
System.map-genkernel-x86_64-4.15.12-gentoo
early_ucode.cpio
grub
initramfs-debian-sources-x86_64-4.14.12-2
initramfs-genkernel-x86_64-4.15.12-gentoo
kernel-debian-sources-x86_64-4.14.12-2
kernel-genkernel-x86_64-4.15.12-gentoo
lost+found
memtest86

# cat /etc/boot.conf
boot {
	generate grub
	default "Funtoo Linux genkrnel debian" 
	timeout 3 
}

"Funtoo Linux" {
        kernel bzImage[-v]
}

"Funtoo Linux genkernel debian" {
	kernel kernel-debian-sources-x86_64[-v]
	initrd initramfs-debian-sources-x86_64[-v]
	params += real_root=auto rootfstype=auto
} 

"memtest86+" {
	type linux16
	kernel /memtest86.bin
}

# boot-update

boot-update 1.8.2 /
Copyright 2009-2017 Funtoo Technologies

 [use option "-l" for license info, "-h" for help]

  * Generating config for grub...

  DEFAULT > Funtoo Linux genkernel debian - kernel-debian-
          sources-x86_64-4.14.12-2

  * NOTE: Detected MBR boot. Configuring for Legacy MBR booting.
  * WARN: Image for section memtest86+ not found - /memtest86.bin
  * WARN: No boot/default match found - using first boot entry by
          default.
  * NOTE: Intel microcode will be loaded at boot-time.

  * Completed successfully with warnings.


# cat /boot/grub/grub.cfg
set timeout=3

  insmod part_msdos
  insmod ext2
  set root=(hostdisk//dev/sda,msdos1)
  search --no-floppy --fs-uuid --set 96d5ade2-b906-499f-9b3f-361df0acc75d
if loadfont /grub/unifont.pf2; then
   set gfxmode=text
   insmod all_video
   terminal_output gfxterm
fi

set menu_color_normal=cyan/blue
set menu_color_highlight=blue/cyan

menuentry "Funtoo Linux genkernel debian - kernel-debian-sources-x86_64-4.14.12-2" {
  insmod part_msdos
  insmod ext2
  set root=(hostdisk//dev/sda,msdos1)
  search --no-floppy --fs-uuid --set 96d5ade2-b906-499f-9b3f-361df0acc75d
  linux /kernel-debian-sources-x86_64-4.14.12-2 rootfstype=auto real_root=/dev/sda3 rootfstype=ext4
  initrd /early_ucode.cpio /initramfs-debian-sources-x86_64-4.14.12-2
	set gfxpayload=keep
}

menuentry "memtest86+" {
}
set default=0