Invisible drag-and-drop window blocks mouse interaction with guest -> duplicate of #14743

[Sam Morris]

Occasionally my mouse stops working in the guest. It turns out there is an invisible window covering the screen that blocks all interaction with the windows on the screen.

Running xwininfo and clicking on the screen outputs the following:

xwininfo: Window id: 0xa00001 "VBoxClientWndDnD"

  Absolute upper-left X:  0
  Absolute upper-left Y:  0
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1920
  Height: 1148
  Depth: 0
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOnly
  Colormap: 0x0 (not installed)
  Bit Gravity State: ForgetGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: yes
  Corners:  +0+0  -0+0  -0-0  +0-0
  -geometry 1920x1148+0+0

xkill does not kill the window, but if I kill off both the VBoxClient --draganddrop processes then the window goes away.

[Mike B]

I am having the same issue - an invisible window that I was able to find using xwininfo (thanks to yrro!)

It seems to happen when I am dragging files and somehow the drag-operation gets interrupted. It seems to happen when dragging buttons in the gnome-fallback (metacity) windows manager to other desktops, or more recently I was dragging a file from within VM to host and a window popped up, affecting the drag.

I was able to kill a couple of the VBoxClient --draganddrop processes, and am still using that session!

I am running Ubuntu 14.04 within VirtualBox 5.0.16, but have had similar issues in 5.0.14 and at least one previous version.

Host VM is Windows 8.something. Laptop is an Asus "Republic of Gamers" 16 GB ram (12 fo VM), Core i7, Video card is NVidia GeForce GTX 860m.

Thanks!

[dobesv]

I'm having the same problem from time to time also.

Host is Windows 10, guest is Linux Mint:

Linux 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Killing the VBoxClient --draganddrop processes removed the invisible window, as described above.

xwininfo output:

    xwininfo: Window id: 0x800001 "VBoxClientWndDnD"

    Absolute upper-left X:  0
    Absolute upper-left Y:  0
    Relative upper-left X:  0
    Relative upper-left Y:  0
    Width: 800
    Height: 600
    Depth: 0
    Visual: 0x21
    Visual Class: TrueColor
    Border width: 0
    Class: InputOnly
    Colormap: 0x0 (not installed)
    Bit Gravity State: ForgetGravity
    Window Gravity State: NorthWestGravity
    Backing Store State: NotUseful
    Save Under State: no
    Map State: IsViewable
    Override Redirect State: yes
    Corners:  +0+0  -1760+0  -1760-685  +0-685
    -geometry 800x600+0+0

[Michael Thayer]

I think this is a duplicate of ticket #14743. Could you please update that with any missing information?

[Michael Thayer]

Mike B, I can't add you to the CC list for that ticket as you have a space in your user name (sorry about that). Could you please add a comment to that ticket if you think it applies? "Me too" is fine.