Sun Microsystems VIRTUALBOX VERSION 3.1.0_BETA2 - Manual (Page 186)

12 Change log
• VMM: FreeBSD guest related fix for V86 flags (bug #2342)
• VMM: fixed guru meditation when booting an AsteriskNow Linux VM (bug
#2342)
• VMM: fixed PGMPOOLKIND_FREE guru meditation (bugs #3356, #3431)
• VMM: fixed Windows XP boot hang (guest PAE + nested paging only)
• VMM: allow mixing of VT-x/AMD-V and software virtualization
• VMM: fixed extremely slow safe mode booting in e.g. Windows 2008 (VT-
x/AMD-V only)
• VMM: significant speedup of certain GRUB boot loaders (e.g. Solaris) (VT-
x/AMD-V only)
• VMM: real-mode IOPL fix for DOS guests (VT-x only)
• VMM: fixed VT-x detection with certain BIOSes that enable VT-x, but don’t set
the lock bit in MSR_IA32_FEATURE_CONTROL
• VMM: fixed hibernation issues on Windows XP hosts (VT-x only; bug #1794)
• VMM: properly emulate RDMSR from the TSC MSR, should fix some NetBSD
guests
• VMM: emulate RDPMC; fixes Windows guests crashes when using the Kaspersky
virus scanner (bug #1778)
• NAT: fixed truncated downloads (FTP) (bug #3257)
• NAT: blocked UDP packets caused a crash (bug #3426)
• NAT: allow to configure the next server and the boot file via VBoxManage (bug
#2759)
• IDE: fixed hard disk upgrade from XML-1.2 settings (bug #1518)
• Hard disk: support more VMDK file variants (including fixed-size ESX server
images)
• Hard disks: refuse to start the VM if a disk image is not writable
• USB: further reduced host CPU utilization for OHCI and EHCI; the “VBoxInternal/Devices/usb-
ohci/0/Config/FrameRate” CFG key is no longer necessary and no longer sup-
ported
• USB: fixed BSOD on the host with certain USB devices (Windows hosts only; bug
#1654)
• E1000: properly handle cable disconnects (bug #3421)
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