Difference between revisions of "Display Power Management Signaling"
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− | [[Category:X Server | + | [[de:DPMS]] |
− | [[Category:Power management | + | [[ru:Display Power Management Signaling]] |
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'''[[Wikipedia:VESA Display Power Management Signaling|DPMS]]''' (Display Power Management Signaling) is a technology that allows power saving behaviour of monitors when the computer is not in use. | '''[[Wikipedia:VESA Display Power Management Signaling|DPMS]]''' (Display Power Management Signaling) is a technology that allows power saving behaviour of monitors when the computer is not in use. | ||
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EndSection | EndSection | ||
− | == | + | == Modifying DPMS and screensaver settings using xset== |
It is possible to turn off your monitor using the {{ic|xset}} tool. Note if using this command manually in a shell you may need to prefix it with {{ic|sleep 1;}} for it to work correctly. For example: | It is possible to turn off your monitor using the {{ic|xset}} tool. Note if using this command manually in a shell you may need to prefix it with {{ic|sleep 1;}} for it to work correctly. For example: | ||
sleep 1; xset dpms force off | sleep 1; xset dpms force off | ||
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=== Prevent screen from turning off === | === Prevent screen from turning off === | ||
+ | |||
+ | You can run this command, and add it to /etc/rc.local: | ||
+ | |||
$ setterm -blank 0 -powerdown 0 | $ setterm -blank 0 -powerdown 0 | ||
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=== xset DPMS settings do not work with xscreensaver === | === xset DPMS settings do not work with xscreensaver === | ||
− | [[xscreensaver]] uses | + | [[xscreensaver]] uses its own DPMS settings. See the settings for xscreensaver for more information. |
==== xscreensaver DPMS ==== | ==== xscreensaver DPMS ==== | ||
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}} | }} | ||
− | == | + | ==See also== |
* [http://webpages.charter.net/dperr/dpms.htm PC Monitor DPMS specification explanation] | * [http://webpages.charter.net/dperr/dpms.htm PC Monitor DPMS specification explanation] |
Revision as of 13:29, 28 October 2012
DPMS (Display Power Management Signaling) is a technology that allows power saving behaviour of monitors when the computer is not in use.
Contents
Setting up DPMS in X
Add the following to your /etc/X11/xorg.conf
in the Monitor
section:
Option "DPMS" "true"
Add the following to the ServerLayout
section, change the times (in minutes) as necessary:
Option "StandbyTime" "10" Option "SuspendTime" "20" Option "OffTime" "30"
Option "BlankTime" "30"
As with newer versions of X it is recommended to use different .conf
files instead of a xorg.conf
, an example file /etc/X11/xorg.conf.d/10-monitor.conf
could look like this.
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
Modifying DPMS and screensaver settings using xset
It is possible to turn off your monitor using the xset
tool. Note if using this command manually in a shell you may need to prefix it with sleep 1;
for it to work correctly. For example:
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 screen-saver control
You can use xset to control your screensaver:
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
To see your current settings
$ 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
Examples
Turn off DPMS
xset -dpms
Disable screen saver blanking
xset s off
Disable DPMS and prevent screen from blanking
Useful when watching movies or slideshows:
xset -dpms; xset s off
Turn off screen immediately
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]
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 DPMS settings do not work with xscreensaver
xscreensaver uses its own DPMS settings. See the settings for xscreensaver for more information.
xscreensaver DPMS
You can configure xscreensaver's DPMS settings manually by editing your ~/.xscreensaver
file as below, or using the xscreensaver-demo gui.
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