From owner-freebsd-current@FreeBSD.ORG  Sat Nov 29 16:49:25 2014
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Date: Sat, 29 Nov 2014 17:49:46 +0100
From: Hans Petter Selasky <hps@selasky.org>
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To: "Ranjan1018 ." <214748mv@gmail.com>, 
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Subject: Re: Virtualbox 4.3.20 crashes FreeBSD 11.0-CURRENT
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On 11/29/14 16:00, Ranjan1018 . wrote:
> *Just upgrade  emulators/virtualbox-ose-4.3.20 via pkg upgrade. Starting a
> VM, Windows XP or Ubuntu x86, after few seconds the laptop freezes.The
> system responds only to power off, pressing the power button for few
> seconds. The only things I can do is a photo of the screen:
> https://plus.google.com/112995826906094353410/posts/6amoaitgP8e
> <https://plus.google.com/112995826906094353410/posts/6amoaitgP8e>*
>
> *Maurizio*

Hi,

Can you try to apply the patch in the following PR:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194196

Not sure if it helps.

--HPS