[X4U] Laptop noisy

[Michel Treisman]

PowerBook G4 17 inch, 1GHz, Mac OS X 10.5.7

This laptop spends a lot of time recently running the fan, if that's  
what makes it noisy. Sometimes it gets very slow  for a minute or two.
(I had my hard disk replaced last month after a crash. I also  
sometimes have difficulty booting up - the video doesn't come on. I  
bought a PRAM battery from appleparts.com and had that installed -  
Foolish of me, I think,  it made no difference - new PRAM battery as  
bad as the old one.)

at 16.22 the system log said:

> Jul  6 16:20:05 localhost com.apple.kdcmond[9197]: kdcmond cannot  
> retreive the computer's local Hostname , retrying ..
> Jul  6 16:20:35: --- last message repeated 2 times ---
> Jul  6 16:20:35 localhost com.apple.kdcmond[9197]: kdcmond cannot  
> retreive the computer's local Hostname , retrying ..
> Jul  6 16:21:20: --- last message repeated 1 time ---
> Jul  6 16:21:20 localhost com.apple.kdcmond[9197]: kdcmond cannot  
> retreive the computer's local Hostname , retrying ..

I ran diskWarrior - nothing wrong but I rebuilt the directory anyway.
I ran Applejack and restarted.

Now the system log says:

> Jul  6 17:14:39 localhost com.apple.kdcmond[234]: kdcmond cannot  
> retreive the computer's local Hostname , retrying ..
> Jul  6 17:14:52 localhost kernel[0]:  
> IOHIDSystem::relativePointerEventGated: Capping VBL time to 830017  
> (was 848478)
> Jul  6 17:14:59 localhost com.apple.kdcmond[234]: kdcmond cannot  
> retreive the computer's local Hostname , retrying ..

What is going on?  Does all this mean anything to someone?  What is  
kdcmond, and what should I do about it?
Mike