The function keys regarding the brightness do not work on my laptop. I am using Ubuntu 10.4 Lucid Lynx LTS 32 bit version.
I've looked on the internet for help regarding my laptop but I cant find any solutions regarding the brightness function keys for my laptop Sony Vaio VGN NR21S. The graphics card in my laptop is NVidia Geforce 8400M GT.
I've tried writing brightness-up and brightness down scripts along with a bash script but even those don't work.
I tried Gnome Power Manager but that didn't solve any issues.
The wireless and sound functions work.
Are there any solutions available for this particular laptop model? I would really appreciate your input regarding the above.
Thanks in advance.