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Currently I am using vga2usb device for interacting with vga device. vga2usb device is actually VGA frame grabber capable of capturing output from virtually any VGA source—such as a Windows PC, a Mac OSX, a Unix machine, an em­bed­ded system, a medical device.

To use this device we have to require relative drivers installed. These drivers are interacting with Video4Linux (V4L).

Now I have to detect that connected VGA device is active or not. (i.e device is in sleep mode or not).

So I have a question how can I find that VGA device is active and sending the VGA signals.

I am using Ubuntu 12.10 for this.

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closed as off-topic by Rinzwind, Jorge Castro, Alvin Row, bain, Javier Rivera Jul 29 '14 at 10:58

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12.10 is end of life so question are not longer accepted. Please upgrade to 14.04 and see if your problem is corrected. –  Rinzwind Jul 28 '14 at 13:04
@Rinzwind Thanks for your reply. I know that 12.19 is EOL but I have to just check the device is active or not that doesn't matter for Ubuntu version. –  user2622247 Jul 28 '14 at 13:09

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