Get usb work in WinGuest on UbuntuHost through VirtualBox

Host: Ubuntu 12.04
Guest: Windows 7
Command: sudo usermod -aG vboxusers
Then log out and log in.

Finding Shutdown in Gnome3

Hold down ALT the Suspend option becomes "Power Off"

Installing Ubuntu 12.04 on SSD@X220

I encountered booting problems on X220 when replaced the original hdd to ssd.
So this is how to solve it:

Hardware:
X220i: i3-2350M, 8G Patriot 1333MHz, Seagate 320G 7200rpm(Original)
SSD: Intel 520 120G (Replace)

BIOS setting
Boot: Choose Only UEFI

Ubuntu from usb boot (Universal USB Installer+ISO file)
Partitions: 50Mb ufi partition (35Mb minimum), 20G root, etc..