Comment 82 for bug 1752961

Dear Christian,
Thank you for your reply.
I took another route which worked.
First i booted with kernel 4.4 normally.
I edited /usr/share/initramfs-tools/scripts/local-premount/btrfs by adding sleep=5 before "/bin/btrfs device scan" line, then i ran the following commands:
update-initramfs -u
update-grub
grub-install /dev/sda
and then rebooted and it works :)

I also removed the rootdelay=5 which i inserted previously and it still works.