I have a VM of 12.04 with 3 monitors, and the center, primary, screen always runs well and for the most part lag-free. The side monitors are very slow to react, and freeze for long periods of time when attempting to use applications on them. Things such as entering text into any application (IRC, gedit, etc).
It works fine when I only use 1 monitor with Vbox and if I use all 3 and don't attempt to use the other 2 screens, it also never fails to work well.
Has this been seen before or is it a known issue?
Ubuntu 12.04 LTS all latest updates (as of 03/01/2014)
VBox with extensions all latest updates (as of 03/01/2014)
Core2Quad 9450 (1core allocated to VM), 8GB RAM (4GB allocated to VM), Intel G2 160GB SSD