Display Power Management Signaling (简体中文)

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DPMS (VESA 显示电源管理信号,简称DPMS)是VESA制定的通过显示卡对显示器电源管理的标准。DPMS规定如果一定时间不对计算机进行操作时显示器自动进入节电模式。

在X中设定DPMS

Note: As of Xorg 1.8 DPMS is auto detected and enabled if ACPI is also enabled at kernel runtime.

/etc/X11/xorg.confMonitor 小节写上:

Option "DPMS" "true"

把下面的配置加入 ServerLayout 小节, 必要时改变时间(以分钟计):

Option "StandbyTime" "10"
Option "SuspendTime" "20"
Option "OffTime" "30"
Note: If the "OffTime" option does not work replace it with the following, (change the "blanktime" to "0" to disable screen blanking)
Option         "BlankTime" "30"

比较新的X推荐使用 .conf 文件代替 xorg.conf, /etc/X11/xorg.conf.d/10-monitor.conf 的一个例子如下:

Section "Monitor"
    Identifier "LVDS0"
    Option "DPMS" "false"
EndSection

Section "ServerLayout"
    Identifier "ServerLayout0"
    Option "BlankTime"  "0"
    Option "StandbyTime" "0"
    Option "SuspendTime" "0"
    Option "OffTime" "0"
EndSection

用xset修改DPMS和屏保设定

可以用官方仓库xorg-xset提供的xset工具关闭屏幕。注意:如果要在shell中关闭显示器,需要在命令前面加上 sleep 1; . 例如:

sleep 1; xset dpms force off

To control Energy Star (DPMS) features (a timeout value of zero disables the mode):

xset -dpms Energy Star features off
xset +dpms Energy Star features on
xset dpms [standby [suspend [off]]]     
xset dpms force standby 
xset dpms force suspend 
xset dpms force off 
xset dpms force on  (also implicitly enables DPMS features)

xset屏保控制

你可以用xset控制你的屏保:

xset s [timeout [cycle]]  
xset s default    
xset s on
xset s blank              
xset s noblank    
xset s off
xset s expose             
xset s noexpose
xset s activate           
xset s reset

查看当前设置

$ xset q

...

Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  600    cycle:  600
DPMS (Energy Star):
  Standby: 600    Suspend: 600    Off: 600
  DPMS is Enabled
  Monitor is On

例子

关闭DPMS

xset -dpms

Disable screen saver blanking

xset s off

关闭DPMS并防止屏幕变为空白

在看电影或幻灯片时有用:

xset -dpms; xset s off

立刻关闭屏幕

If you leave your computer, you do not need to wait for the timeout you set that the display turns off. Simply enforce it by using the xset command.

xset dpms force off

Put screen into standby

xset dpms force standby

Put screen into suspend

xset dpms force suspend

Change Blank time from 5 min to 1 hour

xset s 3600 3600

xset display.sh

You could also copy this script:

/usr/local/bin/display.sh
#!/bin/bash
# Small script to set display into standby, suspend or off mode
# 20060301-Joffer

case $1 in
  standby|suspend|off)
    xset dpms force $1
  ;;
  *)
    echo "Usage: $0 standby|suspend|off"
  ;;
esac

Make it executable (chmod u+x /usr/local/bin/display.sh) and just run display.sh off. For the latter to work you need to include /usr/local/bin into your path.

DPMS interaction in a Linux console with setterm

The setterm utility issues terminal recognized escape codes to alter the terminal. Essentially it just writes/echos the terminal sequences to the current terminal device, whether that be in screen, a remote ssh terminal, console mode, serial consoles, etc.

setterm Syntax: (0 disables)

setterm -blank [0-60|force|poke]
setterm -powersave [on|vsync|hsync|powerdown|off]
setterm -powerdown [0-60]
Note: If you haven't already read the brief DPMS article linked to below, please skim it to understand how DPMS can be used in the console the same as in X.

Prevent screen from turning off

You can run this command, and add it to /etc/rc.local:

$ setterm -blank 0 -powerdown 0

Alternatively you can disable console blanking permanently using the following command:

# echo -ne "\033[9;0]" >> /etc/issue

Pipe the output to a cat to see the escapes

$ setterm -powerdown 2>&1 | exec cat -v 2>&1 | sed "s/\\^\\[/\\\\033/g"

Pipe the escapes to any tty (with write/append perms) to modify that terminal

Note the use of >> instead of >. For permission issues using sudo in a script or something, you can use the tee program to append the output of setterm to the tty device, which tty's let appending sometimes but not writing.

$ setterm -powerdown 0 > /dev/tty3

Bash loop to set ttys 0-256

$ for i in {0..256}; do setterm -powerdown 0 >> /dev/tty$i; done; unset i;

Troubleshooting

xset的DPMS设置在xscreensaver不起作用

xscreensaver用它自己的DPMS设置。 请看xscreensaver的设置以获取更多信息。

xscreensaver DPMS

你可以通过编辑~/.xscreensaver以设置xscreensaver的DPMS设置,或者使用xscreensaver-demo.

timeout:	1:00:00
cycle:		0:05:00
lock:		False
lockTimeout:	0:00:00
passwdTimeout:	0:00:30
fade:		True
unfade:		False
fadeSeconds:	0:00:03
fadeTicks:	20
dpmsEnabled:	True
dpmsStandby:	2:00:00
dpmsSuspend:	2:00:00
dpmsOff:	4:00:00

See also