DPMS don't work

When I write :
<< xset dpms force off >>
I obtain only a blank screen.

I can’t understand why, because it worked on OpenSUSE 11.0 (I’m using OpenSUSE 11.1) and ACPI are active.

I have an laptop Amilo amd 64-bit.

Thanks for help

sorry for the english, I can’t edit :slight_smile:

on xorg.conf I have the option active.
Nobody had the same problem?

Yeah - same problem here on Fujitsu Siemens Esprimo Mobile V6545.