Ok, I'm no expert on power management (otherwise I'd have fixed my resume issue). However, you need to exclude a couple of potential issues first. KDE4 has a new power management system called Power Devil, (which uses a subsytem called solid, which in turn depends on HAL). The former system used powersaved (and kpowersave with KDE3). Some users with both KDE3 and KDE4 installed have had conflicts between the two systems, requiring powersaved to be disabled. The following thread discusses this:
Powersave or Powerdevil? - openSUSE Forums
Now, you might find that kpowersave/powersaved actually work better with your particular hardware. You may need to experiment with this.
If that did not help or apply to you, then I would also recommend upgrading to KDE4.2.4 and see if that helps because significant development and bug fixes have occurred since KDE4.1.3:
KDE4.2.* (How To Add) Guide. - openSUSE Forums
It may also be worth having a look at /var/log/pm-hibernate.log to see if there are any warnings or error messages.
See how that goes. Anyone else have some suggestions here?