I'm running Ubu 8.04 on my laptop. Everything works well until the screen saver kicks in or my laptop goes into sleep mode after 45 mins. Once I resume using the laptop, the computer freezes when I attempt to shutdown. If the laptop goes into sleep mode, the screen blacks out and locks up. Nothing wakes it up and no buttons function. I literally have to press the power button to shut off which I know is not good for the filesystem. Can anyone point me to a thread that deals with this problem or give me some advice. Thanks....