I am running Ubuntu 14.04.3 64-bit, and have two Dell 17" monitors connected at a single VGA port. Both monitors are on, and mirror the same display. I am not able to detect the second monitor, when running "Detect Displays". Here's the output of xrandr -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192 DVI-I-1 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected (normal left inverted right x axis y axis) VGA-1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1280x1024 60.0*+ 75.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 56.2 848x480 60.0 640x480 75.0 60.0 59.9 720x400 70.1
I tried disconnecting one monitor. This changes the detected display from "Unknown" to "Dell 17". I also tried connecting the second monitor at the DVI port, but that alters my primary monitor display, I lose the mouse, and have no way to operate properly. What hardware setup is ideal for dual monitors? How do I solve this problem? I appreciate your feedback.