How to prevent the monitor from turning off in Linux

I have to start a QT-Program on the screen on startup in Linux Mint 9.  The monitor that is displaying the program turns off after an unknown amount of time.  I already deactivated the turnoff in the systemconfiguration, but it doesn't seem to work.

Hardware specs:

• CPU: Intel ATOM 330
• GPU: Nvidia ION (330)
• 2 GB RAM
• OS: Linux Mint 9

I can't change the OS and the other specs.  What can I do to solve this problem?

Solution 1:

try:

xset -dpms
xset s noblank
xset s off 

Solution 2:

Issuing those three commands separately is unnecessary, according to Display Power Management Signaling at ArchWiki.  All you need is

xset s off -dpms

and all you want will happen.

Solution 3:

Maybe this can help you.

In short:

xset -dpms

Solution 4:

Open the Power Manager. Select the Display tab. On the left where is says "Blank after", move the slider all the way to the left under Plugged In, or the corresponding power type, batter or plugged in. This is assuming it's not the screen saver that is making your monitor go blank.

This is for Linux Mint 17.2, so I'm not sure if it will be the exact same with your older version.