4 Guest Additions

sudo apt-get install dkms

Install DKMS before installing the Linux Guest Additions.

2.Mount the VBoxGuestAdditions.iso file as your Linux guest’s virtual CD- ROM drive, exactly the same way as described for a Windows guest in chapter 4.3.1.1, Mounting the Additions ISO file, page 62.

3.Change to the directory where your CD-ROM drive is mounted and execute as root:

sh ./VBoxLinuxAdditions-x86.run

In a 64-bit Linux guest, use VBoxLinuxAdditions-amd64.run instead.

The VirtualBox Guest Additions contain several different drivers. If for any reason you do not wish to install them all, you can specify the ones which you wish on the command line - for example

sh ./VBoxAdditions.run x11

to install the X Window graphic drivers. Type in the command

sh ./VBoxAdditions.run help

for more information.

To recompile the guest kernel modules, use this command:

/etc/init.d/vboxadd setup

After compilation you should reboot your guest to ensure that the new modules are actually used.

4.4.2 Video acceleration and high resolution graphics modes

In Linux guests, VirtualBox video acceleration is available through the X Window Sys- tem. Typically, in today’s Linux distributions, this will be the X.Org server. During the installation process, X will be set up to use the VirtualBox video driver. On recent Linux guests (that is, guests running X.Org server version 1.3 or later with the exception of Fedora 9), graphics modes can be selected by resizing the VirtualBox window using the mouse, or sending video mode hints using the VBoxManage tool.

If you are only using recent Linux guests systems, you can skip the rest of this section. On older guest systems, whatever graphics modes were set up before the installation will be used. If these modes do not suit your requirements, you can change your setup by editing the configuration file of the X server, usually found in /etc/X11/xorg.conf.

VirtualBox can use any default X graphics mode which fits into the virtual video memory allocated to the virtual machine, as described in chapter 3.3, General settings,

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Sun Microsystems VERSION 3.1.0_BETA2 user manual Video acceleration and high resolution graphics modes