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I've got Oracle VirtualBox 4.2.10 installed on Ubuntu 12.04, and with evry virtual machine I create, the "host key", which is supposed to release the mouse doesn't do anything. I've already installed the Guest Additions Expansion Pack (or whatever it's called,) and that didn't fix it. What else should I try?

P.S., not a duplicate of Question 291101 - that one is in Windows 7, this one is in Ubuntu 12.04. The answer to that one is inapplicable to this one.

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In the VirtualBox Manager, under Settings -> Input, ensure that your Host Key is set correctly, and that Auto Capture Keyboard is unchecked (you can change it afterwards to your preferred setting, but check to see if anything was changed to begin with). –  Breakthrough Apr 7 '13 at 12:18

2 Answers 2

to return ownership of keyboard and mouse to your host operating system, VirtualBox reserves a special key on your keyboard for itself: the "host key". By default, this is the right Control key on your keyboard; on a Mac host, the default host key is the left Command key.

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Have you set your release key to something else and forgotten about it? I believe the default key is the right ctrl key, but you can also set your own.

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No, I haven't messed with it at all. It still lists Right CTRL as the Host Key in the lower right hand corner... –  JamesTheAwesomeDude Apr 7 '13 at 4:47
    
Maybe try changing it to something else like one of the function keys –  J.Miller Apr 7 '13 at 4:49

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