persistent screen saver problem

[Charles Jones]

Charles Jones wrote:
> I have a CentOS laptop that is running firefox in kiosk mode (which 
> rotates various system displays and metrics). I'm having problems 
> disabling the screen blanking. Not only is it blanking the screen, but 
> some time after that is does a DPMS powerdown of the display as well.
>
> So far I have tried:
> Disabling the screensaver
> Disabling power management
> Verified that apmd is not running
> xset s off
> setterm -blank 0 -powersave off 0powerdown 0
> checked the BIOS for any power management stuff in there
>
> None of it had any effect!  Any suggestions?
I have since discovered that it is not the screensaver kicking in, but 
rather the monitor itself is just going into powersave mode for reasons 
unknown.  I can go to it and just press the power button and it comes 
out of powersave and shows the display for ~30m and goes back to sleep. 
The display is a large LCD TV/monitor.  The only thing that has changed 
is that the input was coming from a windows OS, which was then 
reinstalled to CentOS. 

Maybe there is something different about the video timings that X is 
using, such that the display thinks there is no signal and turns itself off?