I have a laptop with a HDMI and a D-sub (VGA) output. I have two external monitors, and my laptop detects all three monitors (including its own), but can extend the desktop to only 2 of them (any two).
I want to use all three monitors, including my built-in laptop monitor, as an extended desktop.
I know, it's possible with a USB display adapter, but I found some source without mentioning any USB device with no tutorial for the solution. like this one: Dual external monitors on laptop with two video outputs
May using Windows 8.1 instead of 7 could help me?
How can I achieve this? Any help appreciated, but please note that I try to avoid to use USB devices.
Thanks in advance!
UPDATE: I Have a Lenovo G580, with a NVIDIA GeForce GT 630M graphic card, and a built-in Intel HD graphic card.
CPU #1 Intel(R) Pentium(R) CPU B960 @ 2.20GHz, 2195 MHz
CPU #0 Intel(R) Pentium(R) CPU B960 @ 2.20GHz, 2195 MHz