原文地址：http://www.clearevo.com/blog/howto/2010 ... _1004.html
Howto use your USB device in a Windows XP guest on a Ubuntu 10.04 VirtualBox host:
Part 1 - Generic USB devices
Add your Ubuntu account to group "vboxusers" and "usb": Go to System>Administration>Users and Groups - then "Manage Groups", then: 0.1 double-click "vboxusers" then check/enable your account in there, OK. 0.2 Click Add > enter group name: usb, group id: 85, add your account in there too, OK. 0.3 Restart your computer.
Real thanks to http://forums.virtualbox.org/viewtopic. ... 6&start=30 for the details filtered from the great UsersManual for this case's fix - essence of this post - the rest is just generic...
Download and install vbox from http://www.virtualbox.org/wiki/Linux_Downloads (the OSE version in ubuntu software center dones't have USB settings...)
Add your new guest OS normally.
(While guest is off) Go to settings > USB > Check/enable the USB support, then plug-in your USB device you want to use in the guest OS, click the small button on the right: "add Filter from Device" - select your desired device, make sure it's checked/enabled. OK.
Start your guest, plug-in your USB device then the gust OS should start to recognize it normally - in some cases you should right-click the "usb" icon at the lower-right of the virtualbox window and select/check your device to enable/disable it from guest OS.
注意：usb的group id要设成85