On the Go with FreeBSD and KDE

As I'm a college student I'd like to be able to take my laptop with me from 
class to class.  Take notes, play games, etc etc.  However, I've got a few 
questions / problems.  

1)  Is there some sort of 'standby' mode like Windows has so that the computer 
doesn't take as much power, and also is ON.  I have at most 10 minutes 
between classes and really don't want to turn off the laptop just to boot it 
up again 10 minutes later.  And then repeat this 4 times a day.  Any Ideas?

2)  My laptop runs KDE.  Whenver I close the top while its running, and then 
reopen it, it goes on the fritz (i guess would be the best way to say it).  
Basically, the middle visual gets cut in half and goes to the top and bottom 
and the middle is just a solid weird color, and the mouse has no 'real' 
action on anything.  Is there anything I can do to stop this?  One reason for 
this is...I have a cat, who when I'm around likes to disobey me.  So it would 
be nice to be able to close the top when I leave the room for a few minutes 
and not worry about the cat poking, clawing, sneezing on the monitor.  When 
its closed, he seems to leave it alone (the monitor glow seems to attract 
him).  Currently I move the laptop up high - but he's getting older and 
smart...so this tactic won't last forever.  Ideas??

As always, any help would be greatly appreciated.

~ Matthew

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