unable to adjust brightness on my laptop
 

I have acer Aspire 5742 with mint 9 {64/32 bit both} installed.. I cannot adjust brightness of my laptop in any of them.. The shortcut keys are working fine as increasing or decreasing through keys show icon increasing or decreasing brightness but it is not affecting brightness in anyway...
Thanks in Advance

A quick Google search turns up several things...what have you done/tried so far? Also, the latest version of Mint appears to be 10...bugs and items such as this are often taken care of in new releases.

http://www.linlap.com/wiki/acer+aspire+5742
http://ubuntuforums.org/showthread.php?t=1617362

Thanks, the links you provided worked very fine now problem resolved.....Thanks again..