id summary reporter owner description type status component version resolution keywords cc guest host 3858 VM hangs immediately if USB device is activated via configuration file before starting Henning Moll "I've set up a virtual machine using VB 2.1. Host is Ubuntu Hardy (8.04), guest is WindowsXP. I own a HP C4280 printer which is connected via USB to the host. I added an activated DeviceFilter for this Device. This configuration works perfect with VB 2.1. Note that i had to make sure, that VirtualBox has all needed rights for accessing the Host USB system. I have achieved this by adding none /proc/bus/usb usbfs devgid=124,devmode=664 0 0 to my /etc/fstab. (Without that modification the Printer is listed as Device, but ""greyed"" and therefore cannot be captured/activated withing the guest). So this describes my perfectly running configuration using VB2.1 Now i upgraded to VB2.2 and the virtual machine doesn't start anymore: The VM window appears, a progressbar appears saying ""Starting virtual machine 0% "" and stalls forever - no progress. Please find attached a screenshot and a logfile, both taken in this situation. Even the ""splash screen"" of VirtualBox's BIOS (the blue one) doesn't show up, so i assume it hangs even before that and thus this bug is not guest related (i double checked it with a hard-disk-less VM: Same result: No BIOS screen). Neither the VM window nor the VirtualBox main windows reponds anymore. I have to kill their processes. In the XML file of the virtual machine there is a DeviceFilter element for the printer. If i change its attribute 'active' to 'false', then VB is able to start the VM and the guest boots correctly. As soon as possible i am able to activate the USB Device manually. So the problem occours only, if the Device is activated by configuration. This is a regression to 2.1 Do you need any further information? btw.:Im aam not sure, but this one seems similar to bug #3436 " defect closed USB VirtualBox 2.2.0 fixed other other