When I reopen my MBP i can't adjust brightness, volume, etc. and it lags

Whenever I shut my macbook pro, and then later come back and open it up again, there are always problems. I cant adjust the brightness, or the volume, or the keyboard light. That is the sure sign that something is wrong. Then programs will start freezing or lagging horribly with the spinning ball. Its basically unusable until I do a hard reset. If I tell the computer to shut down or restart, it will not. It will start to, but then it never actually shuts down, and i am forced to hold the power button down. The problem used to happen once in a while, but now it happens basically every time I shut the computer.
This is horribly annoying and i need to get it fixed. However my computer is about a year and a half old, so its out of warrenty. (No applecare). I really do not want to have to pay to have this problem fixed or looked at.
Here is what I have tried thus far:
Using Disk Utility, repaired permissions and repaired the HD.
Using Disk Warrior, did the same thing and deleted or repaired corrupted files that it found.
Reinstalled OS X Lion
Any suggestions?

My guess is that something you've installed is playing havoc with your system. When you reinstalled Lion you probably didn't do a clean install, thus the problem continued. Try creating a new user, then work in that acoount for a while. If the problem stops, you know the problem exists in your user account only. If the problem continues, its system wide and will require  a clean install and reinstallation of your software.

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