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I run a Kali VM (2019.4) inside VirtualBox (6.1) In VM Settings I set number of monitors to 2 and boosted up the video memory to 128 mb.

Guest additions are installed within Kali.

When I boot, I only get a single display, kali doesn't recognise the second monitor and in VirtualBox's "View" when I click on "enable" on the second monitor it just rescales my window-size...

The weird thing is: when I select Scale Mode (Host+C) while the VM is booting, the second monitor appears (it's then also available in kalis display settings). But as soon as I go back to normal or fullscreen mode the second monitor disappears again.

Can someone please help me?

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  • I have exactly the same issue. After Kali upgrade I can only see 1 monitor. Tried updating VirtualBox Additions but it did not help.
    – andriyze
    Jan 15, 2020 at 17:50

1 Answer 1

Reset to default
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  1. I updated my VirtualBox to latest, as well as Extension Pack.
  2. apt upgrade in Kali
  3. copied VBoxLinuxAdditions.run (from Guest Additions CD) and ran it.
  4. rebooted Kali

I now have two monitors again.

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  • I did the exact same thing before writing this post, and it didn't work. Seems the new Update (either Kali or VirtualBox) fixes this now.
    – kappadoky
    Feb 4, 2020 at 15:33

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