managed to fix tty. steps taken: grub> ls (ahci0,msdos1/ # to find root filesystemgrub> linux (ahci0,msdos1)/vmlinuz-4.4.0-161-generic root=/dev/mapper/oem--vg-root
grub> initrd (ahci0,msdos1)/initrd.img-4.4.0-161-generic grub> boot
after this i got a tty login prompt.
