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hello everyone,
i m pretty new to linux. i m trying to figure out whether monitor is on or off by using a c program.i have tried using ddcprobe, it works well with CRT monitor,But in case of LCD monitor it works only when monitor cable is disconnected or power turned off from mains not when u use the monitor button for power ON/OFF.
So is there any way i can tell whether monitor is ON/OFF(i.e button on monitor panel ) without disconnecting power from it?
I m using fc7, monitor is samsung LCD .
Can anyone please help?
Thanks.
hello everyone,
i m pretty new to linux. i m trying to figure out whether monitor is on or off by using a c program.i have tried using ddcprobe, it works well with CRT monitor,But in case of LCD monitor it works only when monitor cable is disconnected or power turned off from mains not when u use the monitor button for power ON/OFF.
So is there any way i can tell whether monitor is ON/OFF(i.e button on monitor panel ) without disconnecting power from it?
I m using fc7, monitor is samsung LCD .
Can anyone please help?
Thanks.
That would depend on the hardware specs of your monitor. Get the programming guide for the particular monitor you're using, and check it out. There's probably a sense-code to look for.
That would depend on the hardware specs of your monitor. Get the programming guide for the particular monitor you're using, and check it out. There's probably a sense-code to look for.
what is sense code? i thought i need to do something like ddcprobe.
what is sense code? i thought i need to do something like ddcprobe.
Sense code is something like ddcprobe, but a generic term. Sense code can be anything the hardware says, like "someone pressed this button", "someone plugged a cable in", etc. That's why you should refer to the manual on your hardware, or look through their docs.
What you're trying to do isn't uncommon...alot of LCD's use the same sort of 'soft' off switch, so I'd guess that they'd all use the same sense code for it.
Sense code is something like ddcprobe, but a generic term. Sense code can be anything the hardware says, like "someone pressed this button", "someone plugged a cable in", etc. That's why you should refer to the manual on your hardware, or look through their docs.
What you're trying to do isn't uncommon...alot of LCD's use the same sort of 'soft' off switch, so I'd guess that they'd all use the same sense code for it.
But it is not necessarily going to be LCD it can be CRT too. And is it possible to read sense code through c program?
But it is not necessarily going to be LCD it can be CRT too. And is it possible to read sense code through c program?
Yes, since (as I said), that's what a ddcprobe does...reads a particular sense code from a particular piece of the hardware.
If you're not knowing what to do with the on/off state, why check it at all? The LCD's aren't really going 'off'...just sleeping. Sending a video signal will probably 'wake' them.
Yes, since (as I said), that's what a ddcprobe does...reads a particular sense code from a particular piece of the hardware.
If you're not knowing what to do with the on/off state, why check it at all? The LCD's aren't really going 'off'...just sleeping. Sending a video signal will probably 'wake' them.
I got the same info that LCD's dont really go off.but what do u suggest then? i should use ddcprobe source code?
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