I found out, it's compiled into ubuntu's kernel. So someone would need to add this to his kernel option line. Since I am new to grub2, I might try later (just saw it can be appended by using dpkg-reconfigure).
I found out, it's compiled into ubuntu's kernel. So someone would need to add this to his kernel option line.
Since I am new to grub2, I might try later (just saw it can be appended by using dpkg-reconfigure).