Delays in shutdown/reboot

I’m not really sure this should be posted here, but anyway the problem is this:

The process of shuting or rebooting gets “paused” in some tasks…and it can take a few minutes to complete it. This doesn’t always happen, and it doesn´t always happen on the same task. No errors or other extra info is shown.

And it gets really strange because if i press any key on the keyboard it moves on in a few seconds. :confused:

Any idea what this might be or where i should start looking for clues?

This is on openSuSE11 64bit btw.