tudor wrote:
> hi!
>
> Xset doesen't help, dpms is disabled, apm is also disabled. There were no
> settings in BIOS.
> System is RH8 kde 3.1 running.
>
> Thanx in advance.

xset -dpms

Make sure you have any power management stuff disabled
in your BIOS.

Unfortunately, there are many variables here....