When i start my Ubuntu (i have only Ubuntu, no other OS- Lenevo B560)the start screen displays this message. I have version 12.04, but initially when i install this there is no such message, but after downloading updates i got this message.The message is like below:-
the Disk driver for
/dev/mapper/cryptswap1 is not ready yet or not present.
continue to wait, or press S to skip mounting or M for manual recovery.
So it takes some more time to boot. I am a basic user having no knowledge about command lines. So please be slight not technical or exact step by step description