id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
7839	Ubuntu 10.04 - Hangup when a monitor goes detached	Martin Wildam		"When at least one (Windows) guest is started and a second monitor is turned off via xrandr (which might also happen when you detach a beamer or external monitor), the host system completely freezes.

Don't know if it happens with other guests too, but I could reproduce the hangup several times using an external monitor and turning off the built-in laptop monitor using:
  xrandr --output HDMI1 --mode 1680x1050 --rate 60 --primary --output LVDS1 --off --output TV1 --off --output VGA1 --off --output HDMI2 --off --output DP1 --off --output DP1 --off --output DP2 --off --output DP3 --off 

To make the external monitor the only active."	defect	closed	other	VirtualBox 3.2.12	obsolete			other	other