I am running 3 monitors with Plugable UGA-2K-A USB 2.0 to VGA/DVI/HDMI Adapter. These adapters are connected to Plugable USB 2.0 10 Port Hub. I am using an HP Envy 15 laptop with the latest drivers and started to experience a problem in the last month or so where my central monitor does not come up during the system boot-up. I have to unplug, then plug back again the usb cord from adapter to monitor in order to fix the problem. This also happens when I lock computer, then unlock ti with password after a bit of time. Can someone please help resolve this issue? Appreciate any help on this.