Toshiba Dynadock W20 - Manual (Page 10)

EN-10 User’s Manual
dynadock™ W20
In some software application programs that utilize certain directdraw
commands such as some 2D-Games, the display on the external monitor
connected to the dynadock will not be supported. If you want to play these
games in fullscreen, we suggest you disconnect the dynadock.
This product is unable to enter full screen DOS mode when using the
external monitor connected to the dynadock.
Depending on your computer system, you may receive a warning message
if the external monitor connected to your dynadock is used as your primary
display.
USB, CPU resources and other devices may be affected when playing
movies or transferring large amounts of data via the dynadock.