How to disable the power management in fedora 12, so that lcd/monitor should not go to sleep/off when system is idle?
2 Answers
Following are commands to successfully disable the Power Management in Fedora
The following will set DPMS(Display Power Management Signaling) parameters
xset dpms 0 0 0
The three zero values represent three different modes
First zero disables the standby mode
Second zero disables the suspend mode
Third zero disables the force mode
The following will disable the screensaver
xset s off
For details please see
man xset
Do you want to just disable this sometimes?
What desktop environment are you using? Gnome has Gnome-power-manager, which allows you to control how the monitor behaves when the machine is idle. In KDE, powerdevil is part of the base, so opening the systems settings (Advanced tab) should get you to the power management settings.
An extreme approach would be to turn off APM and ACPI completely. Turning off APM and ACPI will disable all power management on your computer - on a laptop, you are going to kill your battery performance. That said...
To do it only once:
- When you first start your computer, you get the GRUB screen. Press
ESC
. - Add
apm=off acpi=off
to the end of the line that appears, and press enter. If acpi=on exists, then delete it.
If that works, you can make it permanent:
- Become root (su -)
- Edit /etc/grub.conf
- At the end of the line that starts with kernel, add
apm=off acpi=off
(remove acpi=on) - Save & restart.