This question already has an answer here:
I have a blank screen problem on ubuntu 16.04 start up screen. Initially I was repairing my hard disk with
fsck /dev/sda1 from this post.
In trying solve the black/blank screen problem on startup, I am following instructions from:
chmod 777 / shutdown -r
in the 'root terminal' of recovery mode, but it only allows 'read only'. How can I get it into the 'write mode' for this?
Following the method from:
chmod 777 / but would not accept