VBoxSVC locks up when Sprint USB EVDO is insearted.

[rbhkamal]

I have a USB EVDO (U301USB) from sprint:
​http://support.sprint.com/support/device/Sprint/U301USB_Device_Sprint_3G4G_Mobile_Broadband-dvc1020001prd

If this device is plugged in to my laptop, all of virtualbox binaries exhibit a problem, they start up and then get stuck. It seems that they get stuck while initializing the COM service (vboxsvc.exe) because it gets into a strange state where you can't kill the process.
For example, if I launch vboxmanage list vms, vboxmanage.exe process will start then kick off the COM service. Then vboxmanage.exe will get stuck and the vboxsvc.exe will become unter
Opening VirtualBox.exe GUI also doesn't work for the same reason.
Once you are in that state, you cannot get out if it until the whole machine is rebooted.

Even worse, if you unplug *any* USB device (like a mouse) while in that state, the host OS will blue screen with error IRQL_NOT_LESS_OR_EQUAL


The only way to get a round this is by uninstalling the vboxusbmon service.

Unfortunately I don't have any logs or crash dumps, however, I was able to reproduce the problem with a self compiled version of vbox 4.0.4 with debug. So I have the ability to test patches.

Please let me know if you need any more information

Thanks,

RK