linux 64 bit guest problem

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linux 64 bit guest problem

Postby drb1 » 30. Nov 2009, 23:05

VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.
Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer.


I've just updated to virtualbox 3.1. I've been running virtualbox in a linux 64 bit host for some time; on trying to access a 64 bit linux guest, I get the above error - has something changed from 3.0.12 to cause this to happen?
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Re: linux 64 bit guest problem

Postby Sasquatch » 30. Nov 2009, 23:28

There should be no hardware-V changes since 3.0.12, so it seems that something on the Host changed along the way. Double check your system, maybe some other virtualizer got installed like KVM and is now using VT-x/AMD-V.
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Re: linux 64 bit guest problem

Postby drb1 » 30. Nov 2009, 23:34

I've had kvm installed for some time, running 3.0.12 this morning without any problems.

I've just removed kvm module (modprobe -r kvm_amd) and it's now running OK.

Thanks,

drb
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Re: linux 64 bit guest problem

Postby robatino » 1. Dec 2009, 10:49

I just started seeing this on my 64-bit F12 host with VB 3.1 after applying the latest batch of F12 updates. Yesterday, right after updating VB, it was still working properly. The same fix (modprobe -r kvm_amd) works for me in making my 64-bit guests run again. The kernel update is not the culprit since the same issue exists running the older kernel.
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Re: linux 64 bit guest problem

Postby Sasquatch » 1. Dec 2009, 11:49

The problem is the batch of updates you got. Some distro's automatically install recommended or suggested packages, and KVM seems to be one of them. Remove and purge the package and you should no longer need to remove the module at run time, because the module will no longer exist.

File a bug report for your distro that is breaks already existing virtualizers by automatically installing KVM. They should never install such packages automatically.
Read the Forum Posting Guide before opening a topic.
VirtualBox FAQ: Check this before asking questions.
Online User Manual: A must read if you want to know what we're talking about.
Howto: Install Linux Guest Additions
Howto: Use Shared Folders on Linux Guest
See the Tutorials and FAQ section at the top of the Forum for more guides.
Try searching the forums first with Google and add the site filter for this forum.
E.g. install guest additions site:forums.virtualbox.org

Retired from this Forum since OSSO introduction.
Sasquatch
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Re: linux 64 bit guest problem

Postby robatino » 1. Dec 2009, 21:10

I chose to install Fedora's Virtualization package group. Previously there was no interference with VirtualBox. I'm sure there will be a lot of complaints and I'll manually unload the module until there is a fix.
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Re: linux 64 bit guest problem

Postby Sasquatch » 1. Dec 2009, 21:30

The fix is to remove the virtualization package. Why did you install it anyway? There is no benefit from it, only downsides like this.
Read the Forum Posting Guide before opening a topic.
VirtualBox FAQ: Check this before asking questions.
Online User Manual: A must read if you want to know what we're talking about.
Howto: Install Linux Guest Additions
Howto: Use Shared Folders on Linux Guest
See the Tutorials and FAQ section at the top of the Forum for more guides.
Try searching the forums first with Google and add the site filter for this forum.
E.g. install guest additions site:forums.virtualbox.org

Retired from this Forum since OSSO introduction.
Sasquatch
Volunteer
 
Posts: 17800
Joined: 17. Mar 2008, 13:41
Location: /dev/random
Primary OS: Debian other
VBox Version: PUEL
Guest OSses: Windows XP, Windows 7, Linux


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