For what it's worth, I'm also observing this bug on my Debian Jessie system with Virtualbox 5.0.20.
After I turned on 3D emulation the language selection menu and boot splash worked fine, but after Xfce is loaded I can only see a corrupted portion of the panel.
For what it's worth, I'm also observing this bug on my Debian Jessie system with Virtualbox 5.0.20.
After I turned on 3D emulation the language selection menu and boot splash worked fine, but after Xfce is loaded I can only see a corrupted portion of the panel.