[ubuntu] Disk Drive for dev/mapper/cryptswap 1 is not ready or not present topic

Hello everyone

I have ubuntu 14.10 running in my laptop, and everytime during booting I get the aforementioned message. I have also noticed that in certain circumstances it starts to lag (it has 8Gb in RAM). I've searched the internet for an answer, but so far I have solved nothing.

Any ideas?

Thanks