While booting ubuntu, you are not able to reach upto Login screen. It appears with long list of errors and finally you get "fixing recursive fault but reboot is needed"
Solution :
Boot ubuntu in recovery mode and open command prompt
Now edit following grub file.
sudo nano /etc/default/grub Change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off" sudo update-grub sudo reboot
You should not get the error again and Login screen should be opened successfully.
