Have setup of three monitors, two on an EVGA Geforce GTX550 and one on the plugable UGA and it is an Acer AL2216W. It is connected directly to the USB port on my Dell computer (windows7) using either DVI and VGA input with same results. The resolution is set to 1680x1050. It takes 10 minutes for the monitor to have an image on the screen after starting the computer. I do not use sleep or hibernate. Often the Acer image will flash on and off but the monitor will not show the computer image for 10 minutes. When it finally works, it is OK but the wait is annoying at the least.
I have had this setup for a few years with no problem then without any apparent changes in my setup, this delay began to happen. I can live with it but any suggestions to eliminate the problem will be appreciated.