在Linux上获取已连接电视的电源状态
[英]Get the power status of a connected TV on linux
问题描述
I'm currently trying to turn my display off and on when I leave / enter the house. 
我目前正在尝试离开/进入房屋时关闭和打开显示器。
I'm running an Ubuntu HTPC which is connected to a Samsung TV by HDMI (Intel HD4600). 我正在运行通过HDMI（Intel HD4600）连接到三星电视的Ubuntu HTPC。 Using 'xset dmesq ...' results in switching the HDMI output off/on and doesn't change the power status of the TV (it just looses the signal). 使用“ xset dmesq ...”会导致HDMI输出的开/关，并且不会更改电视的电源状态（只会使信号松动）。 Therefore I connected an IR transmitter which is able to turn the tv off or on - sadly both commands are using the same IR code, resulting in the power status to tip over. 因此，我连接了一个能够打开或关闭电视的IR发射器-可悲的是，两个命令都使用相同的IR代码，导致电源状态翻转。
The xset status also doesn't return the right status, it's always seen as "On", regardless of the power status: xset状态也不会返回正确的状态，无论电源状态如何，它始终显示为“ On”：
<hashworks:~> DISPLAY=:0 xset q | grep 'Monitor is'
Monitor is On
I could save the last display status, but this will result in wrong values when I turn the TV off using the remote etc. The IR transmitter isn't getting anything back as well. 我可以保存最后的显示状态，但是当我使用遥控器等关闭电视时，这将导致错误的值。红外发射器也无法恢复任何状态。
Is there any other way to check the current status? 还有其他方法可以检查当前状态吗？
1 个解决方案
解决方案1
1 2014-05-27 10:29:49
It sounds like what you need is CEC. 听起来您需要的是CEC。
This thread ("Turn on / off TV via HDMI CEC") appears informative: 该线程（“通过HDMI CEC打开/关闭电视”）看起来很有用：
http://www.raspberrypi.org/forums/viewtopic.php?f=35&t=15749 http://www.raspberrypi.org/forums/viewtopic.php?f=35&t=15749
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