CPU at 100% (migrated XP guest from VMWare)

[Doug Roberts]

The CPU is pegged with my XP Windows guest. The Host is an AMD 64 dual core running Kubuntu 8.04:

root@igor:/home/roberts/linux# uname -a Linux igor 2.6.24-19-generic #1 SMP Fri Jul 11 21:01:46 UTC 2008 x86_64 GNU/Linux

I have tried turning off clipboard and USB -- neither helped.

The virtual disk image is one that was converted to a single disk image from a multiple VMWare disk image set.

[Sander van Leeuwen]

Attach your VBox.log here please.

[Philippe Roussel]

I have the same problem with virtualbox 2.0.4 on Ubuntu 8.10 (linux 2.6.27-7). I just attached my VBox.log.

[Rick]

Same here, Ubuntu 8.10

[Rick]

solution is posted here: ​http://forums.virtualbox.org/viewtopic.php?p=45450

Download the "HAL Updater"

Change your ACPI PC to "ACPI Uniprocessor PC".

The HAL Updater can be found here (www.hardware.info):
http://www.hardware.info/en-US/news/ym2cmZqYwp2a/Problems_updating_to_a_dualcore_CPU_Not_anymore/

The problem seems to be that windows finds a quad/dual core, installs the multicore HAL, but virtualbox only allows it to "see" one core, causing an issue.

After reboot I am not seeing the problem anymore.

[Philippe Roussel]

Sorry to post again here but the 'Hal Updater' solution doesn't work for me.

First : after switching to Uniprocessor PC, Windows reboot and set Multiprocessor again. Second : I have the same problem on a single core machine (Athlon64 3000 I think)

Both machines run linux 2.6.27

• Intel T2130, VirtualBox 2.0.6, 32 bits, linux 2.6.27
• AMD Athlon64, VirtualBox 2.2.0, 32 bits, linux 2.6.27.16

Any ideas ? I'm going to try with another kernel version.

[Sebastian]

I'm not sure whether you can do this with the tool, but there is a difference between "ACPI Uniprocessor" and "Advanced Configuration and Power Interface (ACPI) PC". The former one probably reverts to MP when IO-APIC and/or >1 cores are found - or believed to be found - while the latter one is completely unable to do so ...

Maby this helps,
Sebastian

[Sander van Leeuwen]

Duplicate of #4392