CERN Accelerating science


Message boxes keep popping up from Virtualbox. How can I remove them?

Thu, 08/11/2011 - 09:28 — Daniel Lombraña...

VirtualBox warns the user about how the keyboard and mouse will be captured if you click inside the window of the virtual machine. This message will pop up everytime you run a virtual machine unless you tick the "don't show this window again" option in the message box.

My keyboard and mouse do not respond to me. How can I get them back?

Thu, 08/11/2011 - 09:38 — Daniel Lombraña...  (Updated July 2013, BS)

If you click inside the console window of the Virtual Machine and the keyboard and mouse get "grabbed" in the window, then to release them, you have to press the Host Key (Right Ctrl) or (Right Cmd in Mac OS X). You can check which is the Host Key by clicking in: File->Preferences->Input

VirtualBox shows me the following runtime error message: "cannot access the kernel driver!" What can I do?

Fri, 08/12/2011 - 08:15 — Daniel Lombraña...  (Updated July 2013, BS)

(This is a Windows problem only).If you get that error it seems like your VirtualBox installation missed installing the vboxdrv.inf driver. Please first try to reinstall VirtualBox - if this does not solve the problem, go to C:\Program Files\Oracle\VirtualBox\Drivers\ and double click in the file vboxdrv.inf. After that, you should be able to run VirtualBox without problems.

BOINC fails to run any T4T work units. What can I do?

Tue, 07/05/2011 - 10:28 — Daniel Lombraña...  (Updated July 2013, BS)

There could be several possible options for this error, primarily:

(i) VirtualBox is not installed in your computer or

(ii) you have found a new bug in the system.

Some Windows XP users are reporting that by installing Visual C++ 2005 Redistributable Package the project starts working again. You can download this package for 32 bits from here and for 64 bits from here. These packages are official Microsoft solutions and they are free.

If you do have VirtualBox installed, review the FAQ and then ask in the message boards for help, so developers can review the error and help you.

Why my web browser is not supported?

Mon, 01/16/2012 - 15:09 — Daniel Lombraña...  (Updated July 2013, BS)

The web application provided in the virtual machine uses JavaScript, HTML5 and CSS3 to show the results and your BOINC credit, using technologies like JavaScript, JSON and HTML5.

If you cannot enable JavaScript in your browser's settings or your browser does not support HTML5 and/or CSS3, you will be missing a friendly user interface to the results:

  • an interactive gallery with all the figures from the simulations of your computer:
    • zoom in and out with a friendly interface,
    • browse the figures (next,previous and index) using shortcuts and without going back and forward to see other image,
    • swipe movement for flicking through images on touch devices,
    • etc.
  • and some BOINC statistics.

Here you have an screenshot of the web page with a free, modern and open source web browser like Mozilla Firefox or Google Chrome (but note that Safari versions 6+ and Internet Explorer versions 10+ do support our graphics):

You can still access the raw figures and BOINC stats data and the LOGs folder as you will get a warning with links to those resources.

Can I disable the VirtualBox window when running this project?

Mon, 01/16/2012 - 15:12 — Daniel Lombraña...  (Updated July 2013, BS)

Yes, you can.

The new VBox Wrapper runs in headless mode in any case, so there is no fixed console window.

If you still use the older CernVM Wrapper, please, go to your profile account in the Test4Theory web server. Then modify the project preferences by changing the value of the following field: Run Virtual Machine in headless mode: no to yes.

I have a multi-core system but BOINC only uses one

Mon, 01/16/2012 - 15:20 — Daniel Lombraña...  (Updated July 2013, BS)

First of all, please read: "Why the Virtual Machine is not using all my CPU cores?".

Apart fom the above information, there are more considerations as follows. In order to run a multi-core virtual machine, VirtualBox needs a set of specific chip extensions usually enabled by default in recent computers and laptops. However, some vendors disable these extensions in the BIOS configuration, so you will not be able to run a Virtual Machine with two or more cores.



If you want to solve it you will have to access the BIOS settings of your computer. Our recommendation is to read the manuals of your computer and check if there is a clear solution to enable this feature in your computer as every computer has a different set up for the BIOS settings. However, remember that this operation could be dangerous for your system if you modify something different than the virtualization extensions. If you do not feel comfortable modifying the BIOS settings, let the VM run with one core, as the wrapper should detect the problem and run with just one core.

My firewall is complaining. Which ports does this project use?

Tue, 08/02/2011 - 08:33 — Daniel Lombraña...

This project uses the following ports:

  • Jabber messaging which needs XMPP (port 5222),
  • Chirp (port 9094) for moving data in and out,
  • HTTP (port 80) and
  • HTTPS (port 443)

And if you want, you can grant access to the entire CERN network:


No other ports are used by the project.