I’ve done a few test and found that Vmmon.exe sometimes doesn’t recognise the VirtualBox process. I am using VirtualBox 4.0.4, and VirtualKD 2.5.2. I found that this is the case if I change the Global configuration data of VirtualBox to something other than “%HOMEDRIVE%%HOMEPATH%.VirtualBox” through the env variable VBOX_USER_HOME.
Is it possible for VirtualKD to recognise this env variable setting?
I will fix this in the future versions.
For now, you can create a symbolic link in your home directory using mklink command (will work on NTFS drives only).