I have Ubuntu 14.04 32bit LTS installed along with Windows 8 (dual boot). I do not have any graphics card(nvidia ,amd ,etc). I have Intel hd graphics driver. It worked fine for many days, but now, on booting, GRUB boot screen works fine but when I choose Ubuntu (in grub menu) startup gets stuck with blank purple screen(with no splash screen).
On pressing Ctrl+Alt+Del, Ubuntu splash screen (with white dots turning purple) shows for 2 seconds and then PC reboots.
I've tried to remove and reinstall lightdm (my default display manager) from recovery mode but no success