Re: Virtualbox 64 bit guest option is missing

[Camaleón <noelamac@gmail.com>]

On Tue, 28 Aug 2012 20:01:41 +0200, Martin Steigerwald wrote:

> Am Sonntag, 26. August 2012 schrieb Camaleón:
>> On Sun, 26 Aug 2012 18:47:34 +0200, Sven Hartge wrote:
>> > Camaleón <noelamac@gmail.com> wrote:
>> >> On Sun, 26 Aug 2012 18:26:19 +0200, Sven Hartge wrote:
>> >>> Hmm. Could you post the output of
>> >>> 
>> >>>   grep flags /proc/cpuinfo
>> >>> 
>> >>> so that we can see which capabilities the kernel thinks are
>> >>> available on you CPU,
>> >> 
>> >> That will be of little help because CPU will expose the VT-x
>> >> capabilities despite the BIOS have them turned off.
>> > 
>> > Oh?
>> > 
>> > I must admit, I never owned a board/CPU combination, where the CPU
>> > had virtualization features but the board lacked support for them. So
>> > I assumed the capabilities list would reflect this.
>> 
>> I experienced such situation: a BIOS revision that did not expose any
>> VT- x options while the CPU supported them. A BIOS update solved it and
>> a new menu for VT-x was added to the updated BIOS.
>> 
>> But regardless this I think that "cpuinfo" is about CPU and not BIOS
>> capabilities; from here you can't really know what to expect.
> 
> May dmidecode be able to step in there?
> 
> It shows the DMI / SMBIOS tables.

I never have had a positive experience with dmidecode because it provides 
untrustworthy output :-/

Greetings,

-- 
Camaleón