id summary reporter owner description type status component version resolution keywords cc guest host 11725 Dual Monitor Support Failure ArashiDragon "After updating to VB 4.2.12 from 4.1.26, my Linux guest os (ubuntu 12.04) will not detect 2 screens. It clones desktop to both windows opened by VB (VBOX0 & VBOX1). When in System -> Display & Monitor, clicking identify shows VBOX0 & VBOX1 on both virtual monitors (cloned). And the option to change monitors and such in the settings is disabled/grey'd out. It does show both monitors in the settings, but they are copies of each other. disabling one, disables both. I was able to fix this (temporarily) with the following command: xrandr --output VBOX1 --right-of VBOX0 I have to run the command every time I restart the VM. There were no logs or anything to attach as there was no crash or error. The VM works fine, it just clones the desktop to both Virtual Monitors." defect closed GUI VirtualBox 4.2.12 worksforme all all