There is a problem with stretching a wallpaper/solid color area when resizing a VirtualBox window. The wallpaper area must be changing the resolution to cover/fit the whole screen everytime we change resolution of the window. I'm using Kubuntu 15.04 with Plasma 5 as a guest system on VirtualBox. Configuration: 3D support enabled, 120MB of video memory, 2 cores, 4096MB RAM Reproducible: Always Steps to Reproduce: 1.Run Kubuntu 15.04 under VirtualBox 2.Install Guest Addidions (Settings - Drivers Section) 3.Boot with a small VirtualBox window and then maximize it. Actual Results: I suppose the screenshot explains everything perfectly http://i.imgur.com/vyAFtmO.png Expected Results: The background wallpaper/solid color area should have been resized to fit new screen resolution, when resizing VirtualBox window. Host system is Windows 8.1 64bit.
This happened under KVM too. For me the fix was to change to scaling option to something else. It would redraw the wallpaper, filling the entire screen.
+1 also happens with VMware Fusion. low priority but an ugly UI glitch that indeed should be addressed. example of the bug in action: https://youtu.be/gxhA7Vv_5ng?t=2m59s
Also with two independent users running into this bug, not sure why this is still on "unconfirmed" but I'm not familiar with the KDE QA policies.
*** This bug has been marked as a duplicate of bug 342978 ***