I have an HP EliteBook G1 laptop plugged in to an HP docking station. I also have two Acer 22" monitors plugged in to the HP docking station. I just got done installing Ubuntu 14.04 LTS and the mouse flickers and sometimes disappears. This is driving me nutz!
Here is the solution that I've found from all other posts -> Open System Settings > Displays. In the Displays window, you will see an Unknown monitor. Click it and disable it.
The problem is that I don't have "Unknown monitor" on my display screen to un-check. Another problem that I am seeing is that once 22" monitor is showing 1680x1050 and the other is 1280x800 and won't increase in screen resolution.
Any ideas?