#StackBounty: #ubuntu #virtualbox #virtual-machine #gnome #kde-plasma-5 Oracle VirtualBox – Cursor Lost in Top Left Corner

Bounty: 50

In my Oracle VirtualBox 6.1, regularly, a square around 15cm x 15cm in the left top corner does not take the mouse click anymore (left and right). I am not sure what causes it. It comes and goes at random.

Could not see anything obvious from the logs. I have not moved the window, or resized it. The problem just appears and I have to either wait some time (30 mins, or more) or reboot.

The image is Ubuntu, I tried both Gnome and KDE Plasma to exclude an X problem.

What I have tried so far:
* Resizing windows
* Enable/disable mouse capture
* Change the mouse settings to USB Tablet or PS/2 Mouse.

Nothing changes. Only workaround I found is to enable a second monitor and switch my apps to it, ignoring the first.

287:03:09.198303 VMMDev: SetVideoModeHint: Got a video mode hint (120x501x32)@(0x0),(1;0) at 0
287:03:09.202764 GUI: UIMediumEnumerator: Medium-enumeration finished!
287:03:09.237392 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=0000000000000000 w=1920 h=1057 bpp=0 cbLine=0x0 flags=0x2 origin=0,0
287:03:09.251669 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=000000001336b000 w=800 h=600 bpp=32 cbLine=0xC80 flags=0x1 origin=0,0
287:03:09.261604 GUI: UIMachineLogic: Guest-screen count changed
287:03:09.445216 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=0000000000000000 w=800 h=600 bpp=0 cbLine=0x0 flags=0x2 origin=0,0
287:03:09.455684 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=000000001336b000 w=120 h=501 bpp=32 cbLine=0x1E0 flags=0x1 origin=0,0
287:03:09.456747 GUI: UIMachineLogic: Guest-screen count changed
287:03:09.558287 GUI: UIMachineView::sltPerformGuestResize: Sending guest size-hint to screen 0 as 120x501 if necessary
287:03:09.567996 GUI: UIMachineView::sltPerformGuestResize: Sending guest size-hint to screen 0 as 120x501 if necessary
287:03:10.363041 GUI: UIMachineView::sltPerformGuestResize: Sending guest size-hint to screen 0 as 1920x1057 if necessary
287:03:10.375516 VMMDev: SetVideoModeHint: Got a video mode hint (1920x1057x32)@(0x0),(1;0) at 0
287:03:10.381757 GUI: UIMediumEnumerator: Medium-enumeration finished!
287:03:10.537721 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=0000000000000000 w=120 h=501 bpp=0 cbLine=0x0 flags=0x2 origin=0,0
287:03:10.550348 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=000000001336b000 w=120 h=501 bpp=32 cbLine=0x1E0 flags=0x1 origin=0,0
287:03:10.551218 GUI: UIMachineLogic: Guest-screen count changed
287:03:10.577517 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=0000000000000000 w=120 h=501 bpp=0 cbLine=0x0 flags=0x2 origin=0,0
287:03:10.579120 Display::i_handleDisplayResize: uScreenId=0 pvVRAM=00000000114f7000 w=1920 h=1057 bpp=32 cbLine=0x1E00 flags=0x1 origin=0,0
287:03:10.588438 GUI: UIMachineLogic: Guest-screen count changed


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