http://thread.gmane.org/gmane.linux.debian.user/300289/focus=300349

Newsgroups: gmane.linux.debian.user
Date: 2007-08-23

> My newly installed xorg doesn't support dpms any more:
>
>  $ xset dpms force off
>  server does not have extension for dpms option
>  xset:  unknown option force
>
> Which package should I install to get back the functionality?

load/enable the following module,

"extmod"    # some commonly used server extensions (e.g. shape extension)

I'm able to use 'xset dpms force off' again.

xpt

> load/enable the following module,
>
> "extmod"    # some commonly used server extensions (e.g. shape extension)
>
> I'm able to use 'xset dpms force off' again.

xset dpms force standby
xset dpms force suspend
xset dpms force off