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The graphics experience is in fallback mode for me. And I checked the settings and it says the graphics driver is Chromium. I am running Ubuntu 11.10 in a virtual box. I didn't like unity much. So reverted from it long back. and it was working fine till now.

How do I fix the issue. No desktop effects is working now!

Host OS Windows 7
Graphics ATI Radeon HD series
Virtual box version 4.1.6
Another Guest OS Ubuntu Is working fine..

enter image description here

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Have you tried re-installing the virtual box guest-additions for the virtual machine? After a downgrade it might be necessary to re-install them if you haven't used dkms during the first install which automatically rebuilds the virtualbox kernel module in case the kernel version changes due to down/up-grade – Chrisii Sep 21 '12 at 6:54
Yes i did re install the guest additions.. i reset gnome settings.. i also reset the compiz settings.. no use.. i could just enable the transparency of the terminal in the gconf-editor – jaykay90 Sep 21 '12 at 7:06
Have you changed something on your main desktop which runs virtual box that could be affecting the use of vb additions within ? Also, why not try 12.10 beta inside VB since it has Unity running 3d effects all the time, even without proper 3d drivers it reverts to software usage... – user91814 Sep 21 '12 at 7:20
no.. my other virtual box guest ubuntu is running just fine... – jaykay90 Sep 21 '12 at 7:20
Please add the following to your question: host OS, graphics card, virtualbox version and source. Also, what did you do before it stopped working? – Takkat Sep 21 '12 at 10:28

Check that your virtual machine still has the option "Enable 3D Acceleration" checked (in VMs settings -> Display).

share|improve this answer
Yeah.. it's enabled already... – jaykay90 Sep 28 '12 at 6:41

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