Turn computer screen off using matlab function

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Jia Zhen 2015-5-3

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https://ww2.mathworks.cn/matlabcentral/answers/214796-turn-computer-screen-off-using-matlab-function

回答： Marcel 2019-10-24

Hi, i have a code which i want to program to turn computer screen off using matlab function. I do find code which shut down the computer such as system('shutdown -s') but i just need to turn the display off. Could anyone suggest me how to turn it off? I am using window 7. Thanks.

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Answer 1

Jan 2015-5-3

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https://ww2.mathworks.cn/matlabcentral/answers/214796-turn-computer-screen-off-using-matlab-function#answer_177582

编辑：Jan 2015-5-3

在 MATLAB Online 中打开

There are many possibilities, which can be easily found by asking your favorite internet search engine:

http://lmgtfy.com/?q=Windows+switch+off+screen

One solution:

system('%systemroot%\system32\scrnsave.scr /s')

Or with FEX: WinPower:

WinPower('monitor', 'off');

This does not stop the processing. If the computer whould sleep also, use: Winpower('sleep').

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Vittorio Cecconi 2018-8-12

Thank you Walter! But I really need a code, so I can use it in my program.

Walter Roberson 2018-8-12

I am not even close to being a Windows specialist, so I might have missed something, but the information I find suggests that Windows 7 through to earlier Windows 10 only support screensavers on the primary monitor. Later Windows 10 by defaults shows the screensaver on all monitors, and has provision to configure the screensaver to display only on particular monitors, but not to configure different monitors with different screensavers or different timeouts.

So far I only see the following commercial product indicating support for different screensavers with different timeouts on multiple monitors: https://www.actualtools.com/articles/detail.php?ID=1392

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Answer 2

Marcel 2019-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/214796-turn-computer-screen-off-using-matlab-function#answer_398009

在 MATLAB Online 中打开

Trying to use WinPower I get the error "== InstallMex: failed."

>> mex -setup
MEX configured to use 'MinGW64 Compiler (C)' for C language compilation.

For manually compiling I get

>> mex -O -largeArrayDims -D_LITTLE_ENDIAN -DHAS_HG2 -DMATLABVER=907 WinPower.c -v
Error using mex
C:\Users\aktiv\AppData\Local\Temp\mex_237481349027607_8440\WinPower.obj:WinPower.c:(.text+0x238): undefined reference to
`SetSuspendState'
C:\Users\aktiv\AppData\Local\Temp\mex_237481349027607_8440\WinPower.obj:WinPower.c:(.text+0x24c): undefined reference to
`SetSuspendState'
collect2.exe: error: ld returned 1 exit status