Jaunty: computer does not hibernate/suspend after critically low batter

[tish]

Hello,
I am experiencing the following issues. The computer does
hibernate/suspend as the battery reaches critical level, instead it just
shutdowns uncleanly. I have tried all possible options in gnome power
management-shutdown,hibernate,suspend etc . 

I understand the difference b/n hibernate and suspend and my swap file
is just fine. Hibernation, suspend and other power related options work
when being called. I am running jaunty on Dell XPS m1530. It is a clean
installation of Jaunty with all the released updates till now.
I appreciate your help.

Tish