Display Power Management Signaling (简体中文)
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。
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在X中设定DPMS
在 /etc/X11/xorg.conf 的 Monitor 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"
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
可以用官方仓库中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]
防止屏幕关闭
可以运行以下命令, 并使其自启动(如添加到 /etc/rc.local):
$ setterm -blank 0 -powerdown 0
也可以通过下列命令禁止终端清空:
# 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