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Ticket Resolution Summary Owner Reporter
#16240 fixed Fullscreen guest aborted by HP laptop undock Simon Coleman
Description

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.

#16910 fixed monitor detach causes running vm to abort Simon Coleman
Description

Resubmission of #16240 as it applies to 5.1.22 as well. External monitors of differing resolutions to the inbuilt display. Detach of those monitors causes a fullscreen *running* vm to abort.

Success:

  • Using the view menu
  • pausing the vm
  • setting the external monitor to the same resolution as the inbuilt display

All allow the monitor to be detached & the vm to be moved work around the problem.

Also see

#16240 - more detail of this issue from previous vbox versions

#16195 - same behaviour with a linux host (which I commented on/xref to here)

#16059 - similar behaviour on archlinux

#15863 - archlinux host problems relating to guest resize when monitors are moving around

#5119 obsolete "Fluid mode" impossible to disable Simón
Description

I have activated the "fluid mode" (Host+L) but now I can't disable it. Although I press Host+L or I select the option (in menú): "Machine" > "Fluid Mode", VirtualBox doesn't disable it.

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