I’m currently testing Fog 0.33b on Ubuntu Server 14.04.
When PXE booting the machine seems to communicate with the Fog server, however once its got an address the next part fails. It happens too quick to see the actual error on a physical machine and with a virtual I had to record the session and slowdown the playback to see the error.
The Fog PXE boot screen shows very very briefly (less than quarter of a second) and displays the error in the attached file.
Then it displays a generic PXE error:
On the VM: FATAL: Could not read from the boot medium! System halted
On a physical Dell PC: Selected boot device failed. Press any key to reboot the system.