When Lenovo started shipping hybrid graphics in their W500-series
workstations, it was a great improvement for road warriors who need both
full-power graphics when connected to a power source and long battery life on
the go. This is achieved by the presence of two video cards – an integrated
Intel chip side-by-side with an nVidia Quadro GPU. The nVidia drivers ship with
software that automatically switch between graphics modes based on the current
power profile.
This configuration works great until the machine is connected to an external
monitor or projector via the VGA port. For some reason, the nVidia software is
unable to automatically balance the output between both video cards when the
display is duplicated. Many users have resorted to disabling one or the other
video cards in the BIOS, which works fine but requires that the change be made
manually each time to computer is rebooted (assuming that the user wants the low
power mode at some point – if the machine is always plugged in then it's really
not an issue).
There is, however, a way to get display duplication working with the
auto-switching Optimus mode. All the configuration options are there in the
nVidia control panel but the configuration isn't very intuitive. Here's how to
make it work (this holds true for both Windows 7 and Windows 8, although the
sub-menu text in the control panel is a bit different between driver versions)...
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