Is there any way to enable fast user switching in ubuntu? Heres how i use my computer. i log in. and then i use it. then i lock the screen and leave. then if my friend wants to log in. he has to wake ...

I'm using XP PRo at home and for some reason, when I fast user switch, I get a VERY long delay. I will click my user off the list, enter the password, and bam. The wallpaper changes, but thats it.