I’m in a similar position. Not using Linux as host OS but Windows 7 though.
I’ve got the following setup:
Host (vmware): Windows 7
Dev Machine (virtual machine #1): Windows XP
Test Machine (virtual machine #2): Windows XP
I use debugport=COM1 in the debug settings in boot.ini on the Test Machine, and using a named pipe from the Dev Machine as \hostpipecom_1 to connect from the Dev Machine to the Test Machine with WinDbg.
The named pipe from the Test Machine (configured in the vmware settings) creates the named pipe from the virtual machine to the host machine, so I need to connect from the dev machine to the host machine as well to reach the named pipe.
I haven’t been able to get VisualDDK to work yet in this setup, and according to your reply, it will never work?
Will this setup get supported in the future?