Opened 10 years ago

Closed 10 years ago

#12734 closed defect (fixed)


Reported by: mmcginnis Owned by:
Component: other Version: VirtualBox 4.3.8
Keywords: Too many cpuid subleaves Cc:
Guest type: Windows Host type: Windows


I just installed VirtualBox on a Lenovo T410 with Hyper-V enabled. Upon launching a VM I get the lowwing error: Failed to open a session for the virtual machine XP Virtual.

Couldn't find the end of CPUID sub-leaves. (VERR_CPUM_TOO_MANY_CPUID_SUBLEAVES).

Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}

Attachments (2)

VBox.log (39.5 KB ) - added by mmcginnis 10 years ago.
log file
VBox.2.log (36.6 KB ) - added by dhognert 10 years ago.

Download all attachments as: .zip

Change History (11)

by mmcginnis, 10 years ago

Attachment: VBox.log added

log file

comment:1 by dhognert, 10 years ago

Same issue here. Lenovo T430S running Windows 8.

by dhognert, 10 years ago

Attachment: VBox.2.log added


comment:2 by bird, 10 years ago

Summary: When launching a VM on Win 8.1 64bit, I get the error VERR_CPUM_TOO_MANY_CPUID_SUBLEAVES4.3.8: VERR_CPUM_TOO_MANY_CPUID_SUBLEAVES when launching VM [FIXED in SVN]

Thanks to your reports we've been able to come up with a workaround to deal with this unspecified CPUID behavior. We'll try get the fix out ASAP.

comment:3 by mmcginnis, 10 years ago

I found another fix for me. My laptop had Hyper-V enabled in the BIOS (I am unable to disable it due to corporate limitations). I found that doing the following and rebooting my laptop allows the VM's to run:

Hope this helps....

  1. Open Hyper-V manager and "stop service" on the right panel,
  1. Start a command prompt with administrator rights and execute the following command:

to disable hyper-v bcdedit /set hypervisorlaunchtype off

to enable hyper-v bcdedit /set hypervisorlaunchtype auto

  1. Both Operations require restarting your computer.


comment:4 by Frank Mehnert, 10 years ago

Please could you confirm that this build fixes your problem?

comment:5 by tucaz, 10 years ago

I had the same problem and can confirm that the build 4.3.9-92650 fixed the problem.

comment:6 by pcaenaro, 10 years ago

I am running build 4.3.8 r92456, but the update says I am running the latest version. I have the same problem as reported here, how to I get the latest build?

comment:7 by Frank Mehnert, 10 years ago

4.3.8 is the latest released build. If you want to test the test build, see comment 4.

comment:8 by bambitlaw, 10 years ago

Just confirming, I had the same issue and build 4.3.9-92650 fixed it. Lenov idea pad, windows 8.1 64bit

comment:9 by Frank Mehnert, 10 years ago

Resolution: fixed
Status: newclosed

Fix is part of VBox 4.3.10.

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