CentOS Guest - Mini Toolbar not visible in full screen mode w/ 3D enabled + compiz

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The VB mini toolbar is not be visible when running in a Linux (CentOS 6.2 guest) with compiz installed and 3D acceleration enabled w/ guest additions. This only occurs when running the guest OS in the same full screen resolution of the host.

As Tested: VirtualBox: 4.1.14 r77440 Host: Windows 7 (6.1.7601 SP1 Build 7601) Guest: CentOS 6.2 (Kernel 2.6.32-220.13.1el6.x86_64) Compiz 0.8.2

Steps to reproduce:

• Configure all of the above as tested and ensure compiz is running.
• Set guest to full screen and either auto-resize guest to native resolution of host or manually configure guest to use native resolution.

Observe: minitoolbar will not be visible when running in full screen.

WORKAROUND:

• Set the mini toolbar to be visible at the bottom of the screen
• Configure the vertical resolution of the guest OS to be at least 1 pixel less than the native resolution of the host. To accomplish this, I set

my guest resolution to "1920x1079" from "1920x1080" in /etc/X11/xorg.conf.

• Restart linux window manager or reboot the guest, go to display setting and your custom resolution should appear as an option to select.

[misha]

Please attach a VM log here

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.