I've searched for this problem but I cant find a straight answer.
If I go into
/etc/class/backlight, there's nothing there. Could someone help?
I have the Nvidia Driver installed, and the Fn keys aren't changing the brightness.
First give a try to obacklight.
Earlier it solved may problems with sony laptops. Most preferable solution. It is based on nvidabl. You need to install nvidiabl first. Installation instruction is available on the page.
If the above is not working, revert back all changes. Uninstall nvidiabl & remove obacklight script from
See if brightness keys are working.
It is still possible ubuntu won't remember your brightness settings. So you have to change brightness each time.
This is for setting the brightness manually after doing the above steps.
Try the following for the paths shown by the command
If this works, make this happen in each login automatically by doing the following:
Another fix if the above fails:
Execute the following commands:
This solution works on my Sony Vaio laptop.
Try the answer to this question: Brightness is reset to Maximum on every Restart