I have several Ubuntu 10.10 (Maverick Meerkat) servers running in VirtualBox 4.0.4 (however this issue was also present in VirtualBox 3.2.8). When I issue an ACPI shutdown to the VMs, nothing happens.
I have added
acpi=force to the top of
/etc/default/grup (and ran
sudo update-grub), and I have added
I am at a lost for what to try next.