When I start a progamme before going to X-windows, after about 20 minutes the monitor go to suspend mode ( black screen ) automatically, but I have turn off all screen saver and power management settings in Linux FC4 as below, and I also turn off suspend mode and APIC functions at mainboard CMOS setting, so apart from this setting, how can I set (either in Linux or CMOS) to control the monitor not go to suspend mode after a certain of time?

I don't understand this distinction - you are starting the program from the text-mode?"below" where? How did you turn off all power management and screensaver settings?

Does this happen for just one program or for all programs?

Do you start the program in the command line and then x-windows loads and then the screen suspends?

When you move the mouse, or touch a key, the screen returns?

The normal way to disable the screensaver in FC4 (Gnome) is:

main menue > desktop > preferences > screensaver

click the "mode" button, and select "disable screensaver".

Is this what you did?

If this is an acpi/apm suspend, you can turn these survices off on the kernel line in grub.conf or by using:

main menue > desktop > system settings > server settings > services

highlight the service you want to stop and click "stop".

Which did you do?

Aside: please put your location and distrbution in your profile. Thanks.

Thanks your reply.

Yes. When i move mouse or touch a key, the screen return.

I have put the command in the ~/.bashrc to start the program.
So this happen when pass the login screen but before the x-window load the module.
i tried stop the acpi/apm by using
main menue > desktop > system settings > server settings > services
After done this. The pc will not run into screen suspends, but when i start the program by command in ~/./bashrc before load the module, this problem pop up again.

I solve this problem.
using xset command to stop the X11 dpms and screen saver
"xset -dpms"
"xset s off"