Use new official 4.9 kernel build

update-kernel.sh

#!/bin/bash

DLPATH=ftp://vserver.obihoernchen.net/ODROID-XU4-KERNEL/LATEST-4.9
if [[ "$1" =~ ^(ftp|https?):// ]]; then
        DLPATH="$1"
fi

rm -r /boot/*
# for safety
rm -r /tmp/kernel-update

echo "Download kernel"
mkdir /tmp/kernel-update
cd /tmp/kernel-update
wget $DLPATH -O kernel.tar.xz

echo
echo "Extract kernel"
tar -xf kernel.tar.xz

KERNEL_VERSION=$(ls config-* | sed -e 's/^config-//')
echo
echo "Kernel Version: $KERNEL_VERSION"

echo
echo "Copy firmware and modules"
cp -R lib/* /lib

echo
echo "Create intramfs and uInitrd"
cp config-$KERNEL_VERSION /boot
update-initramfs -c -k $KERNEL_VERSION
mkimage -A arm -O linux -T ramdisk -C none -a 0 -e 0 -n "uInitrd-$KERNEL_VERSION" -d /boot/initrd.img-$KERNEL_VERSION /boot/uInitrd-$KERNEL_VERSION

echo
echo "Install kernel"
mount /dev/mmcblk0p1 /media/boot
mount /dev/mmcblk1p1 /media/boot
cp zImage /media/boot
DTB=$(ls *.dtb)
cp $DTB /media/boot
sed -i -r "s/\S+\.dtb;/${DTB};/" /media/boot/boot.ini
echo "Using dtb: $DTB"
cp /boot/uInitrd-$KERNEL_VERSION /media/boot/uInitrd
sync
sleep 3
umount /media/boot

rm -r /tmp/kernel-update

echo
echo "Kernel updated successfully"
echo "Reboot to use new kernel"