I use a plugable USB-VGA 165 to extend the display from a laptop. My current setup is (1) Acer Aspire 5733 laptop with i5-480M, 4GB DDR3 Memory (2) Asus 23" monitor 1920x1080 as main display, and (3) 19" monitor 1289x1024.
I started to notice a considerable drag when I place a firefox browser on #3 and drag and hold Excel windows across it. This would produce a flurry of Excel windows while leaving the browser with blank and spotted display. From time to time the Firefox browser would have random black bars that appear, some as large as half a page.
Can you tell me if such display issues are related to the plugable unit? The problems don’tt seem to be as severe when all the windows are on the main display + laptop combination. I’ve tried reinstallation but the problem continues. Thank you.