The following section describes some issues that are known not to work in VirtualBox 2.2.2. Unless marked otherwise these issues are planned to be fixed in later releases.
64-bit guests on some 32-bit host systems with VT-x can cause instabilities to your system. If you experience this, do not attempt to execute 64-bit guests. Refer to the VirtualBox user forum for additional information.
Shrinking virtual disk images is limited
to VDI files.
VBoxManage modifyhd --compact
command is currently only implemented for VDI files. At the moment the
only way to optimize the size of a virtual disk images in other formats
(VMDK, VHD) is to clone the image and then use the cloned image in the
Some virtual machine properties supported by VirtualBox's own XML file format are not exported. As a result, when exporting and then re-importing a virtual machine with VirtualBox, the settings need not be identical. This is especially true for the I/O APIC setting, 3D acceleration, hardware virtualization, nested paging and other VM properties.
OVF localization (multiple languages in one OVF file) is not yet supported.
Some OVF sections like StartupSection, DeploymentOptionSection and InstallSection are ignored.
OVF environment documents, including their property sections and appliance configuration with ISO images, are not yet supported.
OVA archives (TAR containers) are not yet supported.
Remote files via HTTP or other mechanisms are not yet supported.
3D OpenGL acceleration is limited to OpenGL in certain Windows, Linux and Solaris guests; see Sectionа4.8, “Hardware 3D acceleration (OpenGL)” .
Host-only networking. Creation/deletion of host-only adapters are supported for Windows hosts only presently. On other platforms, there is one fixed host-only interface called "vboxnet0" presently. This will change in a future release.
Vista 64-bit hosts have stability issues when using USB.
Mac OS X host. The following restrictions apply (all of which will be resolved in future versions):
No support for audio input.
The numlock emulation has not yet been implemented.
The CPU frequency metric is not supported.
3D OpenGL acceleration. In general the OpenGL support for Linux guest is experimental. This counts especially in combination with compiz enabled window managers. Additional we are aware of the following issues:
OpenGL windows aren't updated in the Dock Icon real time preview.
There are several redraw problems with compiz enabled window managers on Linux guests. E.g. after save/restore state or a resize of the guest window.
OpenGL host support is not yet available on 64-bit kernels (Mac OS X 10.6).
Linux hosts. There are a few problems when compiz is used as the host's window manager, notably:
seamless mode does not work well (garbled screen display if no windows are open in the guest);
OpenGL guest acceleration (added with 2.1) is very slow.
If you experience these problems, you way want to try using a different window manager, such as metacity.
Solaris hosts. For OpenSolaris and Solaris 10 U5/U6, the following restrictions apply:
There is no support for USB on Solaris 10 hosts. On other supported Solaris systems (OpenSolaris and Nevada), support is experimental. USB device filters do not work at all.
No support for audio input.
Only experimental USB support for OpenSolaris/Nevada hosts (versions 109 and higher recommended).
No ACPI information (battery status, power source) is reported to the guest.
No support for using wireless with bridged networking.
On Solaris 10 U4, zones are not supported.
Guest Additions for OS/2. Shared folders are not yet supported with OS/2 guests. In addition, seamless windows and automatic guest resizing will probably never be implemented due to inherent limitations of the OS/2 graphics system.