Unable to change number of CPUs

Postings relating to old VirtualBox pre-releases
Post Reply
MrX1980
Posts: 26
Joined: 3. Sep 2008, 20:44

Unable to change number of CPUs

Post by MrX1980 »

Hello

At the installation of Vista guest on Windows 7 host I forgot to set the cpu count from 1 to 2.
After that I changed it from 1 to 2 but Vista still show/use one CPU.

<CPU count="2">

Any idea?

VB 3.1.0 beta 3

Image
Attachments
VistaToWin7.xml
(8.63 KiB) Downloaded 20 times
Sasquatch
Volunteer
Posts: 17798
Joined: 17. Mar 2008, 13:41
Primary OS: Debian other
VBox Version: PUEL
Guest OSses: Windows XP, Windows 7, Linux
Location: /dev/random

Re: Unable to change number of CPUs

Post by Sasquatch »

It seems that Vista didn't install the multiprocessor kernel after you enabled multi-processor support. There are numerous threads on the forum that show you how to change that. Though most, if not all, of them are about XP, but that doesn't matter.
Read the Forum Posting Guide before opening a topic.
VirtualBox FAQ: Check this before asking questions.
Online User Manual: A must read if you want to know what we're talking about.
Howto: Install Linux Guest Additions
Howto: Use Shared Folders on Linux Guest
See the Tutorials and FAQ section at the top of the Forum for more guides.
Try searching the forums first with Google and add the site filter for this forum.
E.g. install guest additions site:forums.virtualbox.org

Retired from this Forum since OSSO introduction.
Technologov
Volunteer
Posts: 3342
Joined: 10. May 2007, 16:59
Location: Israel

Re: Unable to change number of CPUs

Post by Technologov »

Try "HALu" software.
http://www.hardware.info/en-US/news/ym2 ... t_anymore/

It is intended for XP, but may work with Vista too...

-Technologov
Post Reply