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Currently I am using vga2usb device for capturing output from the virtually any VGA source such as tab or any another monitor.

If I connect this vga2usb device to my Ubuntu machine then we are getting device nodes in the /dev directory.

Now I have to check that vga2usb is connected to any VGA device or not (means it is active or not). I referred following links

https://unix.stackexchange.com/questions/4489/a-tool-for-automatically-applying-randr-configuration-when-external-display-is-pl

https://stackoverflow.com/questions/5469828/how-to-create-a-callback-for-monitor-plugged-on-an-intel-graphics

https://unix.stackexchange.com/questions/13746/how-can-i-detect-when-a-monitor-is-plugged-in-or-unplugged

But I didn't get any specific solution for it.So how can I find the status of VGA device. Is there any specific command or script or utility that we can use.

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  • This is basically a coding question. It entirely depends on what interface the video grabber provides. All you found are people concerned with the other direction—output, that is.
    – Daniel B
    Jul 25, 2014 at 8:52
  • @DanielB if don't mind can you provide some explanation or any link so that I can understand it
    – user2622247
    Jul 25, 2014 at 10:24
  • There is nothing to explain or link to. Ask the manufacturer or check whether Video4Linux has a flag like that. Again: You are not dealing with an output.
    – Daniel B
    Jul 25, 2014 at 14:20

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