VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
- VMM: fixed VERR_IEM_ASPECT_NOT_IMPLEMENTED Guru Meditations with certain Linux guests if KVM paravirtualization is enabled.
- VMM: fixed VERR_VMX_UNABLE_TO_START_VM Guru Meditations under rare conditions.
- GUI: prevent a crash under certain conditions if the VM is terminated very early.
- GUI: fixed certain keyboard capture issues (5.1.10 regression; Mac OS X hosts only;
- GUI: fixed dragging guest windows in seamless mode with the keyboard captured.
- GUI: fixed a problem where the new version detected dialog was covered by the appliance import dialog.
- Storage: fixed NVMe reset processing when doing rmmod nvme; modprobe nvme in a Linux guest.
- Storage: fixed creating a snapshot when the VM is running and an NVMe controller is present.
- Storage: fixed a problem with the LsiLogic SCSI controller where requests could be lost with SMP guests.
- E1000: fixed "cable disconnected" issue.
- E1000: fixed "TX unit hang" issue.
- Parallel ports: fixed port enumeration on Windows host.
- API: don't crash when sanitizing certain VM names.
- Linux hosts: automatically disable asynchronous I/O on Linux 2.6.18 kernels as high I/O load may trigger kernel oopses on these kernels if this feature is enabled.
- Linux hosts / guests: Linux 2.6.28 compile fix.
- Linux hosts: compile Linux 4.9 compile fix.
- Linux Additions: warn the user about a known bug with older Linux guests (e.g. Debian 7) requiring manual work to get 3D working.
- Linux Additions: fix the graphics driver build with Linux 4.10 and later.
- Windows Additions: fixed a crash in the WDDM driver under certain conditions.