id summary reporter owner description type status component version resolution keywords cc guest host 16240 Fullscreen guest aborted by HP laptop undock Simon Coleman "I can reliably crash either of my guests by undocking my laptop when running a vbox guest in a fullscreen on an external monitor. I have a patched windows 10 laptop host running V 5.10 2x guests, win7-64 & win10, both patched & running GA. When docked I have 2x external HDMI monitors & a laptop display available. The laptop display resolution is identical to one of the monitors (and the other is the same resolution in portrait format). The guests are configured to use 2x monitors & I can direct fullscreen output to any pair without difficulty. Both guest types will be aborted only if an Undock occurs when they are fullscreen & are using one of the external monitors. The following cases work successfully: - Docked, 2nd monitor -> guest running Fullscreen mode -> hdmi disconnected -> Fullscreen guest moved to another monitor - Docked, 2nd monitor -> guest Non-fullscreen (Windowed?) -> Undocked -> guest windows moved to another monitor - Undocked, laptop displayport monitor -> Fullscreen guest on -> disconnect hdmi cable -> fullscreen window moves to laptop screen This case does *not* work - Docked, 2nd monitor -> guest running fullscreen -> Undock -> guest aborted When undocking the laptop (separate switch to disconnect the base station, this also cuts ethernet, power & usb devices, although I do not knowingly have any USB passed through. The win64 guest is a p2v machine (with some cruddy HP device drivers I can't uninstall), but the win10 machine is a clean ISO install done on this laptop. Both behave identically when it comes to aborting on undock. It does not seem to make a difference as to whether the disconnected monitor is set as a primary in the guest or which virtual monitor is assigned. The error is always a memory read error & does not appear to show in the log. Any assistance appreciated." defect closed other VirtualBox 5.1.10 fixed multi-monitor Windows Windows