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I have recently gone through this issue. I am running Lubuntu 13.04 in VirtualBox .So when I have maximized and if I would like switch to next window of main system usually we all do ALT+TAB but thats not getting for main system and going for Vbox's Lubuntu .

So how can i get activated main system ALT+TAB functionality even i have a maximized VirtaulBox operating system .

Thank you .

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2 Answers 2

up vote 2 down vote accepted
  1. Enter into virtual-box

  2. Press the ALT key.

  3. NowALT + TABshould work.
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My solution: VirtualBox: File -> Preferences -> Input -> uncheck "Auto Capture Keyboard"

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