I have Gentoo with KDE running in a Virtualbox VM. It's a new install, created and updated with the most recent packages less than a week ago. When I first start up the VM, the KDE desktop will not respond to the mouse. There's a rectangular box in the bottom right corner that's shaded darker than the rest of the desktop. It appears as though there may be a dialog box there that is not properly displaying. Neither left or right clicking on the desktop, the menu app, the icons on the desktop, etc. has any effect. The system doesn't even seem to register the clicks. (I've also tried clicking on just about every pixel in the shaded dialog-box area.) However,if I put the cursor over the three parallel lines in the upper left corner of the desktop, the icon changes shade and shows the shadow. It doesn't respond to clicks, however.
I can press the Alt-F2 shortcut key and bring up the Run App dialog box. I can run Konsole from there. Once I bring up Konsole, I can move, resize and otherwise manipulate the window with the mouse as normal. I can select text in the window by clicking and dragging. But I still cannot do anything with mouse clicks outside the window. In console, I can kill the plasmashell and manually restart it. Once I do that, the desktop responds to the mouse normally until I restart the VM. I've logged in as root and completely deleted ~/.kde4 (under my normal login) and rebooted without fixing the issue. Since restarting plasmashell causes everything to work normally, I believe this is a KDE issue and not a Virtualbox mouse issue. I suppose it's possible something isn't working right with the virtual mouse when KDE first starts and it is working right later when I restart plasmashell, but that seems unlikely. If it matters, the host machine is also Gentoo running KDE. Any ideas or suggestions for resolving the issue greatly appreciated.
