HAL failes to hibernate

Hello Newsgroup,

if I right-cklick on my Gnome Power Manager version 2.14.3 icon and choose 'Tiefschlafmodus'/'Hibernate' my Medion MD97600 laptop computer will show a black screen but apparently nothing else changes. If I move the cursor into the center of the screen, a login dialog appears. After the login a warning appears: "Hibernate problem. HAL failed to hibernate."
My ACPI functions partially: The computer reacts to varying processor loads by jumping between ACPI states C1, C2 and C3. My computer configuration is documented in
http://www.ubuntuusers.de/paste/7306/
http://www.ubuntuusers.de/paste/7308/
http://www.ubuntuusers.de/paste/7309/
http://www.ubuntuusers.de/paste/7310/
http://www.ubuntuusers.de/paste/7311/
Th computer uses a Intel host bridge 915GM and Intel82801. How can I persuade my computer to suspend and to hibernate?

Regards,
Detlef

Debian 4.0 "etch" Linux 2.6.17-grml#1 SMP PREEMPT 2006-07-25 i686
GNOME 2.14.3, Epiphany 2.14.3, Evolution 2.6.3, OO.o ODE 680_m4 Build-1
MD97600, WinXP MCE 2005