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From: RossettoeCioccolato on 22 Mar 2010 15:54

Leo,

> If you just want all the monitors to enter power-saving state...<

Actually, I'm not interested in the monitors at all; it is the video source
that I am interested in. I want to quiet the source so that it is not doing
much. To be honest, I am not too thrilled about relying on user mode; I am
already working in the kernel. However, win32k!PowerOffGdi() appears to do
what I want and I am not going to access that from the kernel. Hence, the
search for a user mode API that would invoke it. win32k!PowerOffGdi() has
the advantage of syncing up the GDI with the hardware. But then there is
the question of reliability when you are relying on user mode for a critical
function.

I notice that there is a user mode power API. Maybe that will help.

Regards,

Rossetoecioccolato.


From: Nobody on 22 Mar 2010 16:31
"RossettoeCioccolato" <rossetoecioccolato(a)newsgroup.nospam> wrote in message
news:e58VylfyKHA.6140(a)TK2MSFTNGP05.phx.gbl...
> I notice that there is a user mode power API. Maybe that will help.

See WM_SYSCOMMAND/SC_MONITORPOWER.


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