I just bought a new laptop and i have installed windows 8 and ubuntu 12.04 on it. And while using ubuntu i am not able to control my brightness with the dedicated keys or the softwares such as brightness controller and brightness indicator.
I have also tried to search the brightness directory with the command grep . /sys/class/backlight/*
and this is showing no such file or directory error.
So what should i do now..
I have also tried making changes in the grub file.
i have added acpi_backlight=vendor in the grub cmdline default line...
Please help my laptop is working in max brightness and its difficult to work...