USB problems

[Magdalena Bugajska]

I'm having some strange problems with a Vista guest on OS X host. It's not stable so it makes it harder to describe, but here is sort of the worst case:

1. I try to capture my USB flash driver (after it was unmounted from the host) or a Logitech webcam.
2. After a while the device is shown as captured, but with no check mark next to the device in the list and the guest does not see it. Clicking on the device again produces an error with a dialog box saying that it's busy with a previous request. Details are

Result Code: NS_ERROR_INVALID_ARG (0x80070057) Component: HostUSBDevice Interface: IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a} Callee: IConsole {9511bc54-15ee-4ddf-808e-472aba03809c}

The device will stay marked captured in the manager indefinitely (or longer that I have patience to wait for).

Although one time I simply got a message "error capturing device" with whole bunch of zeros for the name of the device followed by death of VM USB as described in #4.

3. If I unplug the webcam, it correctly disappears from the list and once connected it is once again just Busy.
4. If I unplug the USB flash drive without unmounting it in the host system (no clue why it's mounted again), hell breaks loose. Host throws an error and vm ends up showing no USB devices at all. After I shut down the guest, the state in the manager does not change; the guest is marked Running until I restart the application at which point it shows Aborted.

I do not seem to have those problems with internal devices such as built-in webcam.

I have found no way to "recover" except restart the application.

Thanks for your help.

[Magdalena Bugajska]

On another try, I managed to loose all the USB devices without unplugging the flash drive. Meaning I simply tried to capture an available (according to manager) device and next thing I see, is <no available devices>.

Is it possible that something is messing up the Additions? I uninstalled them and reinstalled them but that did not help.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.