I left knoppix running over night and the screen saver was activated and put the video signal on standby, (my monitor has a little light that says if there is a video signal).

Then I tried to move my mouse and keyboard to deactivate the screen saver, since the screen was completely blank (black). This didn't work, so I had to reboot the machine without shutting down by using the reset switch on the computer.

I then had a message on reboot to use fsck manually. I rebooted the machine with knoppix cd and I entered the follwoing command:

fsck.ext3 /dev/hda4

after about an hour the machine completed this command operation. I then rebooted and everything was back to normal.

I then left the computer for 5 minutes and the screen went blank again with the video signal on standby. I couldn't disable this and return to the display by moving my mouse and keyboard.

I had to reboot again without shutting down by pressing the reset switch, again.

I tried to perform fsck with the knoppix CD again but this time it completed without spending any time in the process.
I then rebooted and to my surprise, I was in console mode. So, now, knoppix no longer boots graphically.

How do I fix both of these problems. First, booting in graphical mode. Second, how do I setup the screen saver so that it doesn't disable the video completely to the point that I can't return to a session?