I've been running Ubuntu for some time on my Thinkpad X61 laptop. Recently I decided to finally do the upgrade to 11.04. Previously Ubuntu was recognising the video card, and I even had the advanced window effects enabled with no problem. Now they are disabled and when I go to the additional drivers thing in system administration, nothing comes up. Is my video card, if not how can I install it, and how can I re-enable advanced window effects?