Description of problem:

The 2.6.18-1.2849.fc6 kernel doesn't boot when the computer was shut. It starts,
with the blank screen and the mouse cursor on it, with the rotating blue dots
around it etc., then the screen turns bluish-black with an offwhite small square
in the middle. After about a minute of this (and the computer working hard, as
in any reboot) the screen turns black (yet turned on - it doesn't get shut off)
and just stays there.
Nothing happens - for example, pressing NumLock doesn't light up the NM LED on
the keyboard.

However, when I boot using my self-compiled kernel (2.6.17), it works fine. Then
I press reboot (System->Shut Down->Restart), and boot using the
2.6.18-1.2849.fc6 kernel, it boots perfectly fine.


Version-Release number of selected component (if applicable):
2.6.18-1.2849.fc6

How reproducible:
Always (since I upgraded to FC6 w/ this kernel).

Steps to Reproduce:
To make it not-work:
1. Boot the computer using precompiled 2.6.18-1.2849.fc6.
To make it work:
1. Boot using another kernel, in my case, a self-compiled 2.6.17.
2. Reboot.
3. Use precompiled kernel 2.6.18-1.2849.fc6.
  
Actual results:
Black screen with white square, then nothing (black screen not responding).

Expected results:
Computer to boot...

Additional info:
I don't know what to add... If you need any more information, please ask me and
I will answer... Thank you.