When I'm connected to an external display, I would like to close the laptop without it going to sleep. When I'm not connected to an external display, I would like to have closing the lid put the laptop to sleep. I know I can achieve this by manually switching the power settings, but I'd like something automatic. I'm running Windows 7 (Home Premium 64bit) on an HP Pavilion dm3-1030us. Thanks.

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    I have the same question, but in Ubuntu. Any idea? – Xiè Jìléi Nov 19 '10 at 7:11

Go to control panel then power settings the option should be in there

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    I've already checked there. It only differentiates between plugged in and on battery. There is nothing about being connected to an external display. – blauser Oct 8 '10 at 15:27
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    why dont you set up 2 power plans? its not automatic but its the best you can do – Postal Oct 11 '10 at 8:34

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