id summary reporter owner description type status component version resolution keywords cc guest host 16296 Left half portion of the guest's widescreen desktop becomes unresponsive to left mouse button clicks Tony DeFusco "I am not sure what causes this or how to manually reproduce this behavior; otherwise, I would have reported this issue a long time ago. Almost every day (and after no particular amount of up-time), the left half of my Linux desktop becomes unresponsive to left mouse button clicks. Left-mouse button clicks do continue to work on the right half portion of the screen. Actually, it is not the entire left-half portion of the screen that is affected; more like approximately the left two/fifths (left 40%) portion of the entire screen. This problem is very annoying because smaller windows running in the affected portion of the screen cannot be interacted with or dragged over to the responsive side of the screen. When this problem occurs, nothing I have tried so far (e.g. restarting the window manager) will correct it. I am forced to close out (as best as I can) all the running applications in the Linux guest and then reboot the guest OS. I have no idea what is causing this. A faulty screensaver timeout process? Your guess is as good as mine. Some specific details of my setup: * Guest OS: 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux * Guest window manager: Openbox 3.5.2 * Host OS: Windows 7 Enterprise 64-bit * Host configuration: dual identical DELL P2414H widescreen monitors (1920x1080 resolution); VirtualBox is running as a maximized window on my right-side monitor I believe that this strange behavior has been happening as far back as version 5.0.20 of Virtual Box." defect new other VirtualBox 5.1.10 left mouse button click unresponsive half screen Linux Windows