安装方法： 
sudo add-apt-repository ppa:caffeine-developers/ppa 
sudo apt-get update 
sudo apt-get install caffeine 
卸载caffeine命令：

　　sudo apt-get remove caffeine

　　移除PPA：

　　sudo apt-get install ppa-purge
sudo ppa-purge ppa:caffeine-developers/ppa

Solution 1:

Edit /etc/X11/xorg.conf file using the following command

sudo vi /etc/X11/xorg.conf

      Section "Monitor"

                    Identifier    "Generic Monitor"

                    Option        "DPMS"

      EndSection

and add the following lines

Section “ServerFlags”

#other options can go here

Option “BlankTime” “0″

Option “StandbyTime” “0″

Option “SuspendTime” “0″

Option “OffTime” “0″

EndSection

Save and exit the file

Solution 2

Edit /etc/X11/xorg.conf file using the following command

sudo vi /etc/X11/xorg.conf

This effectively disables power management on your monitor Settings

Section “Monitor”

#other options can go here

Option “DPMS” “false”

EndSection

Save and exit the file and restart your machine

Solution 3

gconftool-2 --set  /apps/gnome-screensaver/idle_activation_enabled --type＝bool  false

gconftool-2 --set /apps/gnome-power-manager/ac_sleep_display --type=int 0

Solution 4

gnome-screensaver-command –inhibit

Solution 5

gnome-screensaver-comand –poke

Solution 6

xset s off

xset -dpms

Solution 7

xset dpms 0 0 60

#60 is the seconds

References:

1、http://shallowsky.com/linux/x-screen-blanking.html

2、http://www.doctort.org/adam/nerd-notes/disabling-screen-blanking-in-xorg.html

3、http://www.linuxquestions.org/questions/linux-general-1/how-to-disable-screensaver-and-monitor-suspend-492027/

4、http://tldp.org/HOWTO/Battery-Powered/displaytypes.html