Virtualbox fails to resume from a saved state if guest network card is disabled (Windows)

[clh]

I have a network adapter setup in a Windows XP SP3 guest PCnet-FAST III (Am79C973). The host is Vista SP1. This adapter in the guest is bridged to the physical Intel Pro/1000 PL on the host. If I suspend the guest while the guest network adapter is disabled, the VM will not resume from a saved state. I get the error:

Unable to restore the virtual machine's saved state from 'C:\Users\chinkle\.VirtualBox\Machines\Molex\Snapshots\{ed3512ab-1484-4b55-bfb9-6fb3a4b2e1c9}.sav'. It may be damaged or from an older version of VirtualBox. Please discard the saved state before starting the virtual machine. VBox status code: -1825 (VERR_SSM_LOAD_CONFIG_MISMATCH).

Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {d5a1cbda-f5d7-4824-9afe-d640c94c7dcf}

[Sander van Leeuwen]

Known problem. It's on our todo list.

[Mitch Bradley]

I experimented with about 20 different configurations. The one thing that mattered was the "Enable USB 2.0 (EHCI) Controller" setting. With that setting checked, I always got the failure cited above. With it unchecked, no failures.

My test configurations spanned the range from no devices enabled (expect the boot floppy) up to every device enables. In all cases, the EHCI setting made the difference.

My guest "OS" is an Open Firmware implementation that can boot via BIOS.

The test methodology was "Machine>Close>Save the Machine State", then "Start".

Using xVM VirtualBox 2.0.2.

[Frank Mehnert]

Bridged Networking on Windows host changed in VirtualBox 2.1.0 so this problem should persist anymore.