VirtualBox 4.1 Beta 1 released

Pre-VirtualBox 5.1 forum

VirtualBox 4.1 Beta 1 released

Postby frank » 30. Jun 2011, 22:12

Please do NOT use this VirtualBox Beta release on production machines. A VirtualBox Beta release should be considered a bleeding-edge release meant for early evaluation and testing purposes.

You can download the binaries here.

Please do NOT open bug reports at but use our VirtualBox Beta Feedback forum to report any problems with the Beta. Please concentrate on reporting regressions since VirtualBox 4.0.10.

VirtualBox 4.1 will be a new major release. The following major new features were added:
  • Support for cloning of VMs (bug #5853)
  • GUI: enhanced wizard for creating new virtual disks
  • GUI: new wizard for copying virtual disks
  • VMM: raised the memory limit for 64-bit hosts to 1TB
  • Windows guests: Experimental WDDM graphics driver
  • Guest Additions: modules and features now are represented as facilities to have a common interface for frontends.
  • New Networking Mode: UDP Tunnel. Allows to interconnect VMs running on different hosts easily and transparently, see the manual for more information.
In addition, the following items were fixed and/or added:
  • VMM: more SMP timer fixes
  • VMM: fixed sporadic recompiler crashes with SMP guests
  • VMM: many small fixes
  • GUI: when reverting to a snapshot, ask for taking a snapshot of the current state
  • GUI: added View menu
  • GUI: added setting for the promiscuous mode policy for internal networks, bridged networks and host-only networks
  • GUI: the VM description is editable during the runtime of a VM
  • GUI: added proxy settings (bug #2870)
  • VBoxManage: changed syntax of the guestcontrol command group, fixed various bugs
  • VBoxBalloonCtrl: new service for automatic dynamic adjustment of the balloon size for running VMs
  • Settings: machine names and snapshot names are not allowed to be a valid UUID
  • Storage: virtual CD/DVD images will be detached if the guest ejects the medium
  • Floppy: several bugs have been fixed
  • BIOS: disk-related structures are now checksummed correctly
  • USB: many fixes for the Windows USB host driver
  • NAT: reduced memory footprint
  • Serial: announce the serial devices in the ACPI tables to make Windows guests find the virtual hardware (bug #7411)
  • VRDP: support for TLS connections
  • VRDP: support for multimonitor client configurations with MS RDP client
  • 3D support: fixed GL_VERSION string for different locales (bug #8916)
  • Windows hosts: fixed copy'n'paste in the GUI and for the VM window (bug #4491)
  • Guest Additions: improved driver installation on Windows guests
  • Guest Additions: fixed high CPU usage while executing guest programs from the host
Oracle Corporation
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