This is a maintenance release. The following items were fixed and/or added: VMM: Improved performance of 64-bit Windows and Solaris guests when Hyper-V is used on recent Windows 10 hosts VMM: Fixed frequent crashes of 64-bit Windows Vista and Server 2003 guests when Hyper-V is used GUI: Fixed regression where user was not able to save unset default shortcuts (bug #20305) Storage: Fixed regression in LsiLogic SAS controller emulation caused VM crash (bug #20323) This is a maintenance release. The following items were fixed and/or added: VMM: Fixed extremely poor VM performance depending on the timing of various actions (regression in 6.1.0) VMM: Fixed guest OS hanging under certain circumstances when Hyper-V is present (bug #20141) VMM: Fixed Guru Meditation error when using a nested hypervisor under certain circumstances (bug #20175) VMM: Fixed a SMAP related host panic affecting Solaris 11.4 systems with Intel Haswell CPUs or later (bug #16068) OCI: Add cloud-init support for export to OCI and for OCI instance creation GUI: Fixed "Delete all files" leaving behind Logs/VBoxUI.log (bug #20235) Audio: Multiple fixes and enhancements Audio: Fixed detection of duplex audio devices on macOS (5.0 regression; bug #20171) Network: Fixed link status reporting for "not attached" adapters Network: Fixed connectivity issues with e1000 in OS/2 guests (6.1.18 regression; bug #20148) Network: Fixed VxWorks e1000 driver compatibility issue (bug #20182) Network: Fixed GUI checks for port forwarding rules rejecting IPv6 with "Nat Network" (bug #14847) DHCP: Don't crash in the presence of fixed address assignments (bug #20128) Serial: Fixed possible VM hang when using the a serial port in disconnected mode (bug #19854) Webcam: Fixed interoperability with v4l2loopback and fixed a crash under certain circumstances (bug #20176) NVMe: Fixed sporadic Windows VM hang or reboot on high CPU load VBoxManage: Allow changing network adapter attachment of a saved VM with "modifyvm" vboximg-mount: Fix for argument processing to honor the '--root' option (6.0 regression; bug #20073) Linux host and guest: Support kernel versions 5.11 (bug #20198) and 5.12 Linux host: Maximum MTU size increased to 16110 for host-only adapters on Linux kernels 4.10+ (bug #19122) Linux Guest Additions: Fix vboxvideo module compilation for kernel version 5.10.x Linux Guest Additions: Fixed kernel module build for RHEL 8.4 beta and CentOS Stream (bug #20289) Linux Guest Additions: Fixed issue when it was not possible to run executables from mounted share (bug #20320) This is a maintenance release. The following items were fixed and/or added: Nested VM: Fixed hangs when executing SMP nested-guests under certain conditions on Intel hosts (bug #19315, #19561) OCI integration: Cloud Instance parameters parsing is improved on import (bug #19156) Network: UDP checksum offloading in e1000 no longer produces zero checksums (bug #19930) Network: Fixed Host-Only Ethernet Adapter DHCP, guest os can not get IP on host resume (bug #19620) NAT: Fixed mss parameter handing (bug #15256) macOS host: Multiple optimizations for BigSur Audio: Fixed issues with audio playback after host goes to sleep (bug #18594) Documentation: Some content touch-up and table formatting fixes Linux host and guest: Support kernel version 5.10 (bug #20055) Solaris host: Fix regression breaking VGA text mode since version 6.1.0 Guest Additions: Fixed a build failure affecting CentOS 8.2-2004 and later (bug #20091) Guest Additions: Fixed a build failure affecting Linux kernels 3.2.0 through 3.2.50 (bug #20006) Guest Additions: Fixed a VM segfault on copy with shared clipboard with X11 (bug #19226) Shared Folder: Fixed error with remounting on Linux guests This is a maintenance release. The following items were fixed and/or added: VMM: Fixed random memory corruption and XMM register state corruption inside the VM when Hyper-V is used (bug #19695) VMM: Fixed VMSVGA 3D support with Linux guests when Hyper-V is used (bug #19884) GUI: Fixed some Qt related crashes on macOS Big Sur Oracle Cloud Infrastructure integration: Fixed network integration not working behind some proxies USB: Mask out remote wake capability to avoid unresponsive devices Audio: Fixed issues with audio playback after host goes to sleep (bug #18594) Serial: Keep transferring data if the status line monitoring fails Serial: Fixed blocking a re-connect when TCP mode is used (bug #19878) HPET: Fixed inability of guests to use the last timer VBoxManage: Fixed detection of system locale when running 'VBoxManage unattended install' without --locale (bug #19856) macOS host: Installer on Big Sur is now reminding user that system has to be rebooted to load the installed KEXTs Linux host and guest: Support kernel version 5.9 (bug #19845) Linux guest: Workaround to improve resizing of 32-bit VMs with VMSVGA graphics controller, and do not try to use RandR version 1.3 due to bugs causing the X server to hang Linux guest: Fixed VBoxService crashing in the CPU hot-plug service under certain circumstances during a CPU hot-unplug event (bugs #19902 and #19903) Linux guest: Fixed Guest additions build for RHEL 8.3 beta (bug #19863) This is a maintenance release. The following items were fixed and/or added: GUI: Fixes file name changes in the File location field when creating Virtual Hard Disk (bug #19286) VMM: Fixed running VMs which failed to start with VERR_NEM_MISSING_KERNEL_API_2 when Hyper-V is used (bug #19779 and #19804) Audio: fix regression in HDA emulation introduced in 6.1.0 macOS host: Fixed webcam passthrough and audio input on Mojave and newer by requesting authorization from the user (bug #19758) macOS host: VBoxHeadless no longer able to start VMs (6.1.4/6.0.18 regression; bug #19706) Windows host: Fixes in serial port implementation Shared Clipboard: Fixed a potential crash when copying HTML data (6.1.2 regression; bug #19226) Linux host and guest: Linux kernel version 5.8 support EFI: Fixed reading ISO9660 filesystems on attached media (6.1.0 regression; bug #19682) EFI: Support booting from drives attached to the LsiLogic SCSI and SAS controller emulations This is a maintenance release. The following items were fixed and/or added: UI: Fixed Log-Viewer search-backward icon Devices: Fixes and improvements for the BusLogic SCSI controller emulation Serial Port: Regression fixes in FIFO data handling Oracle Cloud Infrastructure integration: Experimental new type of network attachment, allowing local VM to act as if it was run in cloud API: Improved resource management in the guest control functionality VBoxManage: Fixed command option parsing for the "snapshot edit" sub-command VBoxManage: Fixed crash of 'VBoxManage internalcommands repairhd' when processing invalid input (bug #19579) Guest Additions, 3D: New experimental GLX graphics output Guest Additions, 3D: Fixed releasing texture objects, which could cause guest crashes Guest Additions: Fixed writes to a file on a shared folder not being reflected on the host when the file is mmap'ed and the used Linux kernel is between version 4.10.0 and 4.11.x Guest Additions: Fixed the shared folder driver on 32bit Windows 8 and newer returning an error when flushing writes to a file which is mapped into memory under rare circumstances Guest Additions: Improved resize coverage for VMSVGA graphics controller Guest Additions: Fixed issues detecting guest additions ISO at runtime Guest Additions: Fixed German translation encoding for Windows GA installer This is a maintenance release. The following items were fixed and/or added: GUI: Fixed crash when using Qt on Xwayland sessions (bug #19583) GUI: Fixed mouse pointer doesn't work properly in Windows guests when scaling is on (bug #19597) VBoxManage: Fixed crash of 'VBoxManage internalcommands repairhd' when processing invalid input (bug #19579) Settings: disable audio input and audio output by default for new VMs (bug #19527) Guest Additions: Fixed resizing and multi monitor handling for Wayland guests. (bug #19496) Guest Additions: Fixed VBoxClient error: The parent session seems to be non-X11. (bug #19590) Linux host and guest: Linux kernel version 5.7 support. (bug #19516) This is a maintenance release. The following items were fixed and/or added: GUI: Fix several layout and mouse position handling bugs with soft keyboard GUI: Fixed crash on last VM removed (6.1.4 regression; bug #19568, #19525, #19506, #19490, #19481, #19397) GUI and API: Allow renaming VMs which are in saved state Serial: Fixed slow guest output when using the TCP server mode without anyone being connected Guest Additions: Restored 'VBoxClient--checkhostversion' functionality (6.1.0 regression; bug #19470) Guest Additions: Fixed resizing and multi monitor handling for X11 guests. (6.1.0 regression; bug #19496) Guest Additions: Build problems fix with Oracle Linux 8.2 (Red Hat compatible kernel) / Red Hat Enterprise Linux 8.2 / CentOS 8.2 (bug #19391) Guest Control/VBoxManage: Fixed handling of multiple environment variables supplied to 'VBoxManage guestcontrol VM run' (6.1.6/6.0.20 regression; bug #19518) Guest Control: Implemented support for long(er) command lines Guest Control: Various stability improvements This is a maintenance release. The following items were fixed and/or added: GUI: Multiple enhancements including visual elements updates Graphics: Fixed monitor resizing and multi-monitor handling bugs on X11 guests with VMSVGA graphics adapter Graphics: Enhancements in 2D and 3D acceleration and rendering USB: Multiple enhancements improving prformance and stability Serial port: Improve error handling and fix hang when host port disappears VBoxManage: Multiple fixes for guestcontrol operations API: Fix for exception handling bug in Python bindings Shared clipboard: Multiple fixes including possible crash and HTML data support Linux host and guest: Support Linux kernel 5.6 (bug #19312) This is a maintenance release. The following items were fixed and/or added: Virtualization core: Fixed a rare issue with ICEBP instruction causing guru meditations on Intel hosts (6.1.0 regression; bug #19171) Virtualization core: Fixed macOS Catalina guests failing to boot after upgrading to 10.15.2 onwards (bug #19188) GUI: Recent NLS integration and bug fixes for GUI and Qt translation tags USB: Fixed isochronous transfers to the VM for xHCI Serial: Fixed buffer handling, avoiding receiving stale data when the receive queue is flushed (bug #18671) Serial: Improve host serial port passthrough handling on Windows host VBoxManage: Restore old --clipboard option for modifyvm command macOS host: Use hardened runtime and request the needed entitlements, meeting latest notarization rules which also required moving VirtualBoxVM executable macOS host: Update osxfuse to v3.10.4 Windows host: Update Italian translation of installer Windows host: Improve shared folder compatibility with POSIX append semantic (bug #19003) Windows host: Restore the ability to run VMs through Hyper-V, at the expense of performance Linux guest: Support Linux 5.5 (bug #19145) Linux guest: Shared folder fix for loopback mounting of images BIOS: Always report non-ATA disks as ready BIOS: Report EFI support through DMI table (bug 19144) VGA BIOS: Reduce stack space usage for INT 10h handlers This is a maintenance release. The following items were fixed and/or added: Virtualization core: Fixed performance issue observed with Windows XP guests on AMD hosts (6.0.0 regression; bug #19152) Virtualization core: Consistent IBRS/IBPB CPUID feature reporting, avoids crash of NetBSD 9.0 RC1 installer (bug #19146) GUI: Fixed updating of runtime info GUI: In Display settings, do not show "2D video acceleration" checkbox if it is meaningless for the selected graphics adapter Audio: Fixed audio input handling when VRDE is enabled Audio: Fixed crash in the HDA emulation when using multi-speaker configurations Storage: Fixed use of encrypted disks with snapshots involved (6.1.0 regression; bug #19160) Storage: Improve performance of virtio-scsi Storage: Read-only support for compressed clusters in QCOW2 images Windows installer: Include unintentionally dropped vbox-img.exe utility again Windows host: When installing or removing an extension pack, retry the sometimes failing directory renaming (usually caused by anti-virus software accessing the directory) Linux host: Support Linux 5.5 (guest additions not yet) Windows guest: Accelerate 2D video decoding (scaling and color space conversion) if the VM is configured to use VBoxSVGA with 3D enabled Windows guest: Fix guest additions installer to upgrade the mouse filter driver reliably Windows guest: When uninstalling older Guest Additions with old 3D support enabled try restoring original Direct3D files Linux guest: Improve resize and multi-monitor handling for VMs using VMSVGA (known remaining issue: do not disable a monitor "in the middle", causes confusion) This is a major update. The following major new features were added: Implemented support for importing a virtual machine from Oracle Cloud Infrastructure Extended support for exporting a virtual machine to Oracle Cloud Infrastructure, allowing the creation of multiple virtual machines without re-uploading. Also added option to export a VM to the cloud using the more efficient variant "paravirtialized", and to specify free-form tags for cloud images Virtualization core: Support for nested hardware-virtualization on Intel CPUs (starting with 5th generation Core i, codename Broadwell), so far tested only with guest running VirtualBox Graphics: New style 3D support (with VBoxSVGA and VMSVGA) remains, old style 3D support (with VBoxVGA) has been completely removed Shared Clipboard: Implemented experimental support for file transfers (Windows hosts/guests only at the moment). Needs to be enabled via VBoxManage (disabled by default). In addition, the following items were fixed and/or added: Virtualization core: Drop recompiler, i.e. running VMs now needs a CPU supporting hardware virtualization Runtime: Works now on hosts with many CPUs (limit now 1024) Appliance and Cloud Import: Add field for defining firmware type (not part of OVF spec and thus manual in the Appliance case, for OCI it is automatically taken from the instance information) GUI: Improved the VISO creation and file manager dialogs GUI: Virtual machine list of VirtualBox Manager was improved. Machine groups are now more obvious visually and VM search functionality has been improved. Global Tools element can now be pinned in place, to avoid scrolling it with rest of machine list GUI: Virtual machine details pane is now extended with embedded editors for selected VM attributes, allowing user to edit them on-the-fly byi clicking corresponding hyper-links without opening VM settings dialog GUI: Details pane provides more complete information GUI: Internal medium enumeration routines were optimized to reduce the load and optimize the performance in cases when user have lots of media registered. Also, we again allowed to add existing media (and create new) via Virtual Media Manager GUI: More consistent medium selection (both showing known images and allowing to select using the file picker) GUI: VM storage settings page was adjusted a bit in usability regard. User is now allowed to change controller bus type and can move attachments between the controllers by using drag and drop GUI: Storage and Network settings pages bug-fixes and usability optimization GUI: Added a new soft (virtual) keyboard enabling arbitrary keyboard input to guests, including multimedia keys GUI: Fixed crash in cloud related wizards when accessibility functionality was enabled GUI: Show VM CPU load as part of status bar CPU indicator GUI: Improved and extended the Session Information dialog GUI: Fixed/improved mouse pointer scaling GUI: Some issues related to mouse integration cursor scaling were addressed (bug #14366), more to go GUI: Fix and unify geometry save/restore in various dialogs GUI: Added the missing restriction options for disabling new functionality such as the VISO creator GUI: Popup messages mouse click fix Graphics: Remove 3D support for VBoxVGA (old one deprecated with 6.0) Graphics: Additional texture format support on Windows host Graphics: Improved fix for flickering on Windows host Input: Added support for horizontal scrolling in the PS/2 mouse device using the IntelliMouse Explorer protocol. Note that this support is automatically used by Linux guests but not by Windows guests vboximg-mount: Experimental support for direct read-only access to NTFS, FAT and ext2/3/4 filesystems inside a disk image without the need for support on the host vboximg-mount: Now also available on Linux host Storage: Experimental support for virtio-scsi, for both hard disks and optical drives (including boot support in BIOS) Storage: For optical drive emulation fix empty host drive crash USB: Improvements for EHCI controller implementation USB: Filter can now specify port path, uniquely identifying a port in a system NAT: Fix TFTP OACK response, send only if request has options NAT Network: Use non-blocking sockets on Linux for accepted incoming connections (port forwarding) PCnet-ISA: Added new network adapter type, currently CLI only Audio: Allow changing the host audio backend while the VM is in saved state ACPI: Report NVMe controller VGA: Improve hardware and BIOS compatibility VBoxSVGA/VMSVGA: Support YUV2 and related texture formats with hosts using OpenGL (macOS and Linux), which accelerates video playback when 3D is enabled by delegating the color space conversion to the host GPU VBoxSVGA/VMSVGA: Several drawing fixes for the 3D case VMSVGA 3D: Fixed OpenGL compressed textures VBoxManage: More cloud functionality coverage, e.g. starting a cloud instance VBoxManage: As part of the guest control feature support moving multiple source files/directories to a target directory Guest Control/VBoxManage: Added support for specifying multiple sources when renaming guest files VBoxManage: Show "unrestricted guest" and "nested HW virtualization" CPU features when listing the host information API: Reduce the amount of leftovers from Move VM function Shared Clipboard: Implemented experimental support for file transfers for Linux hosts on Windows guests (disabled by default) SMBIOS: Store system UUID in little endian format which is the default for new VMs, while existing VMs stick to the old VirtualBox behavior of storing them in big endian format for backwards compatibility to avoid breaking the activation status of Windows VMs VBoxSDL frontend: Fixed running on Windows hosts macOS host: Fix VM crashes (most visible on macOS Catalina) Linux host: Improve vboxweb systemd service dependency information Linux host: Drop PCI passthrough, the current code is too incomplete (cannot handle PCIe devices at all), i.e. not useful enough Linux host and guest: Support Linux 5.4 (bug #18945) Linux host and guest: Force disabling of kernel module signing during build (user can do it afterwards) Windows host: When possible, distinguish USB devices by port number; helps with accurate capturing of devices when multiple otherwise identical devices are connected Windows Guest Additions: Many fixes for drawing problems in the driver for VBoxSVGA Windows Guest Additions: Fixes for legacy VBoxVGA adapter, restore previously working cases Windows Guest Additions: Restore VHWA functionality for VBoxSVGA Windows guest: DXVA implementation for WDDM driver Documentation: Updated supported host operating systems, added few new manual pages (more to come later) EFI: Switch to newer firmware code base and add NVRAM support, should improve compatibility with OSes significantly EFI: Added support for booting from APFS EFI: Added support for non-standard SATA and NVMe boot device paths created by OS X EFI: Modified updated EFI code base to support older OS X guests again