I installed ubuntu 12.04 on my laptop for first time and every thing work well but the only thing doesn't work is the brightness doesn't change when I press F5 and F6 with Fn
So I can't adjust the Brightness and sometimes I need to decrease it for more time working on battery
and the bubble appear that it changed but nothing happens
My laptop is Sony VAIO series F with NVIDIA GEFORCE ...
and NVADIA accelerated graphic driver is activated