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After consulting HDMI vs Component vs VGA vs DVI vs DisplayPort, I've decided to buy a HDMI cable to connect laptop with external display. Before that I've used a VGA cable.

I've set up dual-head display and checked Multiple displays: Extend these displays in Control Panel -> All Control Panel Items -> Display -> Screen Resolution.

The problem is that every time my laptop decides to turn off displays, after I woke up it, the settings return to default Multiple displays: Show desktop only on 1 and I have to manually switch it to Extend these displays. Which is, as you can imagine, very annoying. The problem didn't occur when I used the VGA cable.

  • Does anyone know how to solve this problem?

I think this has something to do with HDMI display sending receiver disconnected to the laptop. It just looks like Windows thinks that a new monitor has been connected every time.

My configuration: Windows 7 x64 running on ASUS N76V Laptop with Intel HD Graphics 4000 and NVIDIA GeForce 650M. External display: NEC MultiSync EA244WMi.

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Problem has been solved after laptop reboot.

I wouldn't reboot the PC my self, but after waking it up and turning on the monitor (on a login screen of Windows 7), a BSoD happened. Now every time I wake up computer after Windows turns off displays, Extend theses displays works out of the box.

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