VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V extension

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VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V extension

Postby alex256 » 10. Nov 2011, 13:29

Hi TEAM.

I tried to use 4.1.6 VB for run 64-bit guest OS-es, but recognition of 64-bit CPU and VT-x\AMD-V extensions is not working properly. When I run Virtual_Machine for 64-bit guest OS, I have the following message prior the VM is start:
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 double checked VT-x\AMD-V feature in BIOS - it enable!
My system's properties is:
OS Name Microsoft Windows 7 Enterprise 64bit
Version 6.1.7600 Build 7600
OS Manufacturer Microsoft Corporation
System Name ASAVKIN-WS01
System Manufacturer LENOVO
System Model 43192GG
System Type x64-based PC
Processor Intel(R) Core(TM) i7 CPU Q 820 @ 1.73GHz, 1734 Mhz, 4 Core(s), 8 Logical Processor(s)
PROCESSOR_ARCHITECTURE AMD64
PROCESSOR_IDENTIFIER Intel64 Family 6 Model 30 Stepping 5, GenuineIntel <SYSTEM>
PROCESSOR_LEVEL 6 <SYSTEM>
PROCESSOR_REVISION 1e05 <SYSTEM>
BIOS Version/Date LENOVO 6NET73WW (1.33 ), 17.09.2010
SMBIOS Version 2.6
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale Russia
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name < omitted >
Time Zone Russian Standard Time
Installed Physical Memory (RAM) 4,00 GB
Total Physical Memory 3,93 GB
Available Physical Memory 1,64 GB
Total Virtual Memory 8,16 GB
Available Virtual Memory 5,52 GB
Page File Space 4,23 GB
Page File C:\pagefile.sys


Where can be the problem? Please, request me for any additional information regarding my question.

Regards,
Alexey.
alex256
 
Posts: 3
Joined: 10. Nov 2011, 12:39
Primary OS: MS Windows 7
VBox Version: OSE Debian
Guest OSses: CentOS

Re: VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V exten

Postby Perryg » 10. Nov 2011, 15:29

The error indicates that VirtualBox sees the flag but for some reason can't use it. Do you also have XP mode installed?
Another issue may be a security setting in your bios. Trusted Execution Technology & Execute Disable Bit
Perryg
Site Moderator
 
Posts: 25942
Joined: 6. Sep 2008, 22:55
Primary OS: Linux other
VBox Version: OSE self-compiled
Guest OSses: *NIX - Other

Re: VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V exten

Postby alex256 » 10. Nov 2011, 17:22

Hi Perryg!

Thank you for your attention.

I will check all security settings and will inform you about. But this problem was raised, when I upgrade my 4.0.<don't remember> VB to 4.1.6
On 4.0.x there was no any issues with 64bit VMs.

May be some additional logs/debugs can be collect regarding this error?

Regards,
Alexey.
alex256
 
Posts: 3
Joined: 10. Nov 2011, 12:39
Primary OS: MS Windows 7
VBox Version: OSE Debian
Guest OSses: CentOS

Re: VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V exten

Postby Perryg » 10. Nov 2011, 17:32

Additional checks were added in VirtualBox to help eliminate any potential critical problems.
Hopefully this is what you are actually seeing and correcting bios entries will fix your issue.

If not then we are going to need to see the guests log file (as an attachment)
Perryg
Site Moderator
 
Posts: 25942
Joined: 6. Sep 2008, 22:55
Primary OS: Linux other
VBox Version: OSE self-compiled
Guest OSses: *NIX - Other

Re: VB 4.1.6 don't recognize 64-bit CPU and VT-x\AMD-V exten

Postby alex256 » 10. Nov 2011, 17:43

Hi Perryg!

The problem was solved by disabling "Execution Prevention" flag in BIOS. Now, all working fine.

Thank you very much for you help!

Best regards,
Alexey.
alex256
 
Posts: 3
Joined: 10. Nov 2011, 12:39
Primary OS: MS Windows 7
VBox Version: OSE Debian
Guest OSses: CentOS


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