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Hardware-assisted Virtualization "not available"

Source: microsoft.public.virtualpc
Sent: 06/13/2008
From: Ultimus
Message:

All,

last week I received my brand new PC (Dell OptiPlex 755 with E8400 Intel
Core 2 Duo), and I'm not able to get Hardware-assisted Virtualization running
on Virtual PC 2007 SP1.
My host system is a Vista Business x64 with 4 GB RAM, and all Virtualization
options are enabled in the BIOS. I even did a BIOS Firmware update to the
latest - no change. I read, that sometimes you need to do a cold boot in
order to make Virtualization changes in the BIOS work -> no change.

Am I missing something? What else could be the reason for VPC not to allow
me doing hardware virtualization? I found a tool on the internet
http://www.grc.com/securable.htm that I ran on my PC, and the result was "64,
Yes, Yes" which means that my 64-bit OS is able to do hardware virtualization.

Thanks for your help guys!

Thomas

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Related Messages

Re: Hardware-assisted Virtualization "not available"

Sent: 06/13/2008
From: Steve Jain <(email address - cut out)>
Message:

On Fri, 13 Jun 2008 06:27:00 -0700, Ultimus
<(email address - cut out)> wrote:

Unfortunately, one BIOS update might not be enough. On my Toshiba
M400, it took Toshiba 4 or 5 BIOS updates to get HW virtualization to
work without crashing the host PC.
Try contacting Dell support and see if this is a known issue.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.

Show quoted text

>All,
>
>last week I received my brand new PC (Dell OptiPlex 755 with E8400 Intel
>Core 2 Duo), and I'm not able to get Hardware-assisted Virtualization running
>on Virtual PC 2007 SP1.
>My host system is a Vista Business x64 with 4 GB RAM, and all Virtualization
>options are enabled in the BIOS. I even did a BIOS Firmware update to the
>latest - no change. I read, that sometimes you need to do a cold boot in
>order to make Virtualization changes in the BIOS work -> no change.
>
>Am I missing something? What else could be the reason for VPC not to allow
>me doing hardware virtualization? I found a tool on the internet
>http://www.grc.com/securable.htm that I ran on my PC, and the result was "64,
>Yes, Yes" which means that my 64-bit OS is able to do hardware virtualization.
>
>Thanks for your help guys!
>
>Thomas

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Robert Comer <(email address - cut out)>
Message:

Is the VM running or in a saved state? It's normally grayed out in
those cases. (Because you can't change it unless it's fully shut
down.)

--
Bob Comer

On Tue, 17 Jun 2008 08:16:00 -0700, Frank
<(email address - cut out)> wrote:

Show quoted text

>
>
>"Steve Jain" wrote:
>
>> Unfortunately, one BIOS update might not be enough. On my Toshiba
>> M400, it took Toshiba 4 or 5 BIOS updates to get HW virtualization to
>> work without crashing the host PC.
>> Try contacting Dell support and see if this is a known issue.
>
>Looks like a bug in Virtual PC imho, rather than a bios problem. I
>installed the version 6.0.192.0 and hardware virtualization worked to start
>with, but now it says that "hardware virtualization is not available on this
>computer". I even have a virtual machine with the setting enabled, yet now
>it is greyed out.
>
>My processor is a Q6600 with hardware virtualization enabled in the bios.
>GRC SecurAble confirms this, but does mention something about problems with
>64-bit Windows and 32-bit virtualization code.

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Frank
Message:

"Steve Jain" wrote:

Looks like a bug in Virtual PC imho, rather than a bios problem. I
installed the version 6.0.192.0 and hardware virtualization worked to start
with, but now it says that "hardware virtualization is not available on this
computer". I even have a virtual machine with the setting enabled, yet now
it is greyed out.

My processor is a Q6600 with hardware virtualization enabled in the bios.
GRC SecurAble confirms this, but does mention something about problems with
64-bit Windows and 32-bit virtualization code.

Show quoted text

> Unfortunately, one BIOS update might not be enough. On my Toshiba
> M400, it took Toshiba 4 or 5 BIOS updates to get HW virtualization to
> work without crashing the host PC.
> Try contacting Dell support and see if this is a known issue.

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Frank
Message:

"Frank" wrote:

Hmmm as a follow up, I have tested my configuration (Vista Ultimate X64) in
VMWare and there is either a problem with the bios (newest version XFX 680i)
or with Windows. I am unable to boot an x64 version of CentOS, "CPU does not
support long mode," whatever that means. VT is definitely enabled in the
bios, although perhaps it doesn't work properly. This page may also be of
interest:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1901

Strange that VPC worked with VT support to start with though.

Show quoted text

>
> My processor is a Q6600 with hardware virtualization enabled in the bios.
> GRC SecurAble confirms this, but does mention something about problems with
> 64-bit Windows and 32-bit virtualization code.

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Frank
Message:

"Robert Comer" wrote:

No unfortunately that is not the case Bob, but thanks for the suggestion.
It also gives the same disabled message when going into File, Options, VT
support.

Show quoted text

> Is the VM running or in a saved state? It's normally grayed out in
> those cases. (Because you can't change it unless it's fully shut
> down.)
>

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Steve Jain <(email address - cut out)>
Message:

On Tue, 17 Jun 2008 08:16:00 -0700, Frank
<(email address - cut out)> wrote:

If it was a bug in VPC, why would a BIOS update from the vendor fix
it?
There've been a lot of issues with BIOS implementations of HW.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.

Show quoted text

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Steve Jain <(email address - cut out)>
Message:

On Tue, 17 Jun 2008 08:16:00 -0700, Frank
<(email address - cut out)> wrote:

After you updated your BIOS have you done a power cycle, not just a
reboot? VT usually requires a power cycle, a reset/reboot won't clear
the settings and enable it.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.

Show quoted text

Re: Hardware-assisted Virtualization "not available"

Sent: 06/17/2008
From: Robert Comer <(email address - cut out)>
Message:

Worth a shot.

You might try a BIOS reset to factory settings, then enable VT again.
I had to do that on my HP.

--
Bob Comer

On Tue, 17 Jun 2008 08:50:02 -0700, Frank
<(email address - cut out)> wrote:

Show quoted text

>"Robert Comer" wrote:
>
>> Is the VM running or in a saved state? It's normally grayed out in
>> those cases. (Because you can't change it unless it's fully shut
>> down.)
>>
>No unfortunately that is not the case Bob, but thanks for the suggestion.
>It also gives the same disabled message when going into File, Options, VT
>support.

Re: Hardware-assisted Virtualization "not available"

Sent: 06/18/2008
From: Robert Comer <(email address - cut out)>
Message:

That's fairly common and it's a BIOS issue.

--
Bob Comer

On Wed, 18 Jun 2008 12:02:31 +0200, news.ziggo.nl <(email address - cut out)> wrote:

Show quoted text

>>
>> After you updated your BIOS have you done a power cycle, not just a
>> reboot? VT usually requires a power cycle, a reset/reboot won't clear
>> the settings and enable it.
>>
>
>On my Intel motherboard I have a similar problem: after a compleet
>shutdown an startup VT works perfectly (both in Virtual PC as in VMWare)
>However: whenever my PC wakes up from hybernation it no longer supports
>VT, not until I do a compleet shutdown again.

Re: Hardware-assisted Virtualization "not available"

Sent: 06/18/2008
From: news.ziggo.nl <(email address - cut out)>
Message:

>

On my Intel motherboard I have a similar problem: after a compleet
shutdown an startup VT works perfectly (both in Virtual PC as in VMWare)
However: whenever my PC wakes up from hybernation it no longer supports
VT, not until I do a compleet shutdown again.

Show quoted text

> After you updated your BIOS have you done a power cycle, not just a
> reboot? VT usually requires a power cycle, a reset/reboot won't clear
> the settings and enable it.
>

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