id summary reporter owner description type status component version resolution keywords cc guest host 3470 abnormal cpu consumption when usb mapping enabled luis peralta "When mapping USB ports from the host to the guest system, VirtualBox consumes around 50% of the host CPU time even when the machine is idle. Same results occur with EHCI enabled or disabled. Attached USB device is a temperature sensor which is polled every 5 minutes for its value. I can expect VBox to consume that much CPU while the device is being used, but not when idling. Deactivating USB support makes VBox consume less 5% CPU on the host system most of the time. " defect closed USB VirtualBox 2.1.4 fixed Linux Mac OS X