DPMS not working in 4.5

Shaggy Wolf shaggy.wolf.2006 at gmail.com
Fri Aug 27 16:23:46 BST 2010

On Friday, August 27, 2010 07:33:45 gene heskett wrote:
> Greetings all;
> Running pclos 32 bit on a quad core phenom here.  Currently that includes a
> kde-4.5.0, but the earlier kde-4.4.5 also failed as below.
> This problem exists regardless of the video card, I have tried both an ATI
> HD2400 Pro, and an Nvidia 9400 GT, currently installed and both with and
> without the binary drivers.
> I have not been able to make anything in the way of monitor powerdown work.
> I found in the configure menu's, a place to setup a log file so it would
> record any actions taken, but in about 36 hours, the log remains at zero
> bytes.
> The current power profile is set to 'performance' as the other options all
> seem to be geared for laptop use where battery life is important.  This
> machine runs 24/7, so all I really need is monitor controls.  Using the
> clock as a screen blanker after 5 minutes, I would like to have it powered
> down after 10 minutes.
> This has been true for a succession of pclos supplied kernels and for
> several home brewed ones, currently using and about to make a
> Grepping the /var/log/Xorg.0.log file for DPMS returns:
> (II) Loading extension DPMS
> (**) NVIDIA(0): DPMS enabled
> I found a 'vbetool' utility that can turn it off, but with no way to turn
> it back on except a reboot, this isn't exactly helpfull, but it does show
> that it works if the commands are issued I believe.
> It is possible that I am missing some module required, so what are the
> minimum modules, or kernel options that must be enabled for DPMS to work?
> Many thanks for any hints.

Hi Gene,

Have you tried using xset? i.e. 'xset -q' to show current settings. To set x 
to shut off your monitor after 10 minutes 'xset dpms 0 0 600' should work.

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