i got this used one, but don't know how to undock it. http://www-307.ibm.com/pc/support/site.wss/MIGR-62786.html
step 1 says "Make sure that the system lock key of the ThinkPad X6
UltraBase is in the unlocked (vertical) position."
it's in the unlocked position, but i don't have the key.
Anyone knows how to undock it ?
thanks !