VDRP displays black screen after hard disconnect.

[Byron Sommardahl]

I have an Ubuntu 10.10 host running VirtualBox 4.0.4 r70112. My guest OS is Windows 7 Ultimate. When a VRDP user's connection drops, the guest is nolonger reachable via VRDP. I can still connect to the guest with the correct window dimensions, but my mouse disappears and the window is completely black. No amount of waiting or clicking can change this. I've tried connecting from windows, mac, and linux... all return the same black screen. The guest is accessible from the host session using the GUI. The only remedy to the situation is to restart the guest.

Steps to reproduce:

1. Connect from another client machine to the guest VRDP.
2. Disable network adapter on client machine
3. Re-enable network adapter on client machine
4. Reconnect to guest VRDP.

You will be allowed to connect, but the screen will be black and you will have no control.

[Byron Sommardahl]

I have two Win7 guests. Both behave the same way. I have tried turning off 3d and 2d support. I have tried increasing video memory.

[sunlover]

This problem could be fixed in the new extpack:

​http://www.virtualbox.org/download/testcase/Oracle_VM_VirtualBox_Extension_Pack-4.0-4.0.15r74874.vbox-extpack

Please install and test it. Thanks.