id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
10734	The USB controller is lost at guest machines	gchron		"After updating to MacOS X 10.7 I had a strange problem with USB. When I tried to add a USB was given me the error that it faild to attach the USB device to the guest machine.
I know that could happen if the device is in use and if it as USB storage device I just have to unmount it from the Desktop. 
But this device is not used from MacOS at all.
After some testing I figured out that the device could be used after reboot. So if I wanted to use the device I had to reboot the machine.
After updating to the new version I show something strange the USB was working with no problems at all. So I thought that the problem is solved.
The problem actually is not solved. It is happening if the machine is going to sleep. After wake the VBOX dows not see the USB devices.

So the solution (at least until it is fixed from the developers)
When we install the VBOX application the installed tops all kernel extensions in order to install the new ones and then loads the new ones.

I found this sh script that loads during the installation (I made some changes).


#
# Unload any old extension that might be loaded already (ignore failures).
#
    kextunload -m org.virtualbox.kext.VBoxNetAdp
    kextunload -m org.virtualbox.kext.VBoxNetFlt
    kextunload -m org.virtualbox.kext.VBoxUSB
    kextunload -m org.virtualbox.kext.VBoxDrv

#
# Load the extension, exit on first error.
#
kextload    /Library/Extensions/VBoxDrv.kext
kextload -d /Library/Extensions/VBoxDrv.kext      /Library/Extensions/VBoxUSB.kext
kextload -d /Library/Extensions/VBoxDrv.kext      /Library/Extensions/VBoxNetFlt.kext
kextload -d /Library/Extensions/VBoxDrv.kext      /Library/Extensions/VBoxNetAdp.kext


after that the USB works with no restant any more. We have just run it every time we need USB before start VBOX.

I hope that This probl;em will be solved in future versions of VBOX"	defect	closed	USB	VirtualBox 4.1.18	obsolete		gchron	Windows	Mac OS X