Monitors Won't Sleep in TwinView Mode (Ubuntu Jaunty / gnome-power-manager)

[basskozz-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org (BassKozz)]

On Mon, May 4, 2009 at 10:16 AM, Ben Eisenbraun <bene-Gk2boCrsRs1AfugRpC6u6w at public.gmane.org> wrote:

> The machine was running 32-bit 8.04 and DPMS was working fine under GNOME.
> Then I did a fresh install of 64-bit 8.10 and the monitors stopped going to
> sleep.  I haven't upgraded to 9.04 to test yet.
>
> -ben
>
> --
> character is fate.                                     <heraclitus>
>

But your still able to put them to sleep using "xset dpms force off",
correct?
I am not able too... strange...
Is there a way to check logs to see what is happening when "xset dpms force
off" is issued? If so what logs / where?