id summary reporter owner description type status component version resolution keywords cc guest host 13845 Unable to hide second screen rschoon "In the latest version of VirtualBox (4.3.22), it seems that it is no longer to turn the second screen off from within the guest. In 4.3.20 and earlier it was possible to use xrandr (or the guest OS's display settings) to disable it. Primarily I used two scripts, one to turn it off: {{{ xrandr --output VBOX-1 --off }}} and another to turn it back on: {{{ xrandr --output VBOX1 --auto xrandr --output VBOX1 --right-of VBOX0 }}} The name of the screens did change to VGA0/VGA1, but after fixing the names in the scripts, it only blanks that screen out (until the screen is interacted with) This started occurring after updating the virtual machine to use the latest guest additions, and it works again after downgrading the guest additions back to the previous version. " defect closed other VirtualBox 4.3.22 fixed other other