Because since version 6.2.1 syno signs drivers in the bootloader with its code and what to add there using the methods described by IG-88 will not work. And drivers for i219 are not initially in DSM. You can look at the new files (checksum.syno and grub_cksum.syno) in partition 1 of the bootloader that appear after you install version 6.2.1 or later. root@your_DS:~# mkdir -p /tmp/synoboot_part1 root@your_DS:~# cd /dev root@your_DS:/dev# mount -t vfat synoboot1 /tmp/synoboot_part1 root@y