Hi. Can anyone please tell me how to change this default monitor turnoff time. This is because when I lock my monitor and say go out for lunch, the monitor turns off, and when i try to unlock it, nothing comes up as if there is no signal from the CPU to the monitor and I'm forced to reboot the machine as a last resort. I must mention that this happens only when the monitor is kept off and I don't unlock for say more than 30 mins. I've seen that when I unlock the machine within say 10/15 mins its works fine. Please help me out. Thank you.
I'm using Fedora9 2.6.26 kernel and Samsung syncmaster 591s monitor.

You're probably running into the dpms/energy star feature. You can turn it off using the xset command. "xset -dpms" will disable all energy star features for the monitor, for example. See the man page for more.

It's also possible to add an option line in your xorg.conf to turn off dpms.

thanks for your response but i'm afraid to say that using
"xset -gpms" didn't fix the problem, though i'm pretty sure the solution is something like this only. can you please give me some more ideas on fixing this bug. thank you.