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 currently unavailable.The VBoxManage modifyhd compact command is currently disabled. At the moment the only way to optimize the size of a virtual disk image (VDI, VMDK, VHD) is to clone the image and then use the cloned image in the VM configuration.
- OVF import/export:
- 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.
- Exporting VMs with snapshots is broken in the 2.2 beta. When exporting VMs with snapshots, only the differencing image of the snapshot is exported, whereas the data would need to be merged with the base images upon export. This will be fixed with the final 2.2 version.
- On export, overwriting existing files (OVF or VMDK) is broken and will lead to rather random error messages.
- Certain VMDK 1.1 stream-optimized files may fail to open. We hope to resolve this issue with the final 2.2 version.
- 3D OpenGL acceleration is limited to Linux and 32-bit Windows XP/Vista guests.
- Host-only networking.
- Host-only adapter configuration parameters are shared for all virtual machines even though they appear on the VM Network Settings page. Changing the parameters for one VM will affect all other VMs as well. This will be fixed with the final 2.2 version.
- Also, creation/deletion of host-only adapters and DHCP client configuration via the VirtualBox GUI are supported for Windows hosts only presently. On other platforms, there is one fixed host-only interface caleld "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.
- Generally, support for Mac OS X 10.6 (Snow Leopard) which was added with VirtualBox 2.2 beta is experimental. In particular, the OpenGL host support is not yet available on the 64-bit kernel.
- 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.
- 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.