Black screen after putting ubuntu on stand by

Hi!
I got someone to install ubuntu on a new acer laptop which also has vista on it. So, i used it for 1hour then put it on stand-by. When i restart the computer ubuntu starts correctly but then I have black screen, the keyboard doesn't seem to respond.
Heeeelp!

Thanks

I had a similar thing after

I had a similar thing after using hibernate. Try switching it off then on again, as it's booting up press the escape button until you get a list of kernel options. Go to the first recovery option and if it's the same thing I had it "should" boot normally taking you straight back into the state it was in when you first put it on hold. You should be fine after that.