After working for several times suspend to ram breaks completely

Hello!

I have installed OpenSUSE 10.3 i386 on a Gericom EGO notebook, which is
basically an MSI 1003. 
After installation and all upgrades I was able to suspend the machine
with s2ram and the options "-f -a 1 -v", "-f -a 3 -v", and even "-f -p
-m" worked. But after using this several times, the machine now hangs on
resume. A complete reinstallation can solve the problem, which is really
strange. 
The machine has an ATI Radeon 9700 Mobility and I am using the open
source driver. I have installed no proprietary drivers, if not the
installation program has.

Are there any hints what the problem could be?

Regards,

Detlef