Can you describe exactly how you did this? I tried the steps described at [URL]https://help.ubuntu.com/community/AA1/Fixes[/URL] but something must be missing. I installed the backports Jaunty in package manager. Then rebooted and the light works. I tried the config mod but found it didn't work. I found the fix in the Ubuntu forum on this site. It's a great help for people like me who have a basic knowledge of Linux. A big thank you to every one who has contributed to finding various fixes.