How do I get the brightness control working on an HP 6735s?

Question

I can't change the brightness on my screen via hotkeys or any other method. I'm stuck with low brightness which is very hard on my eyes during long periods in front of my laptop. Is there any working solution out there?

Answer 1

Give this a try:
http://ubuntuforums.org/showthread.php?t=2139397&p=12621502&viewfull=1#post12621502
look at the kernel boot parameters
the file to edit is /etc/default/grub
after editing run sudo update-grub and reboot
to edit the file use
gksu [leafpad/gedit/mousepad/geany/scite] /etc/default/grub
[leafpad/gedit/mousepad/geany/scite] is a list of names, if i wanted gedit i would do this:
gksudo gedit /etc/default/grub

Answer 2

Try installing the xbacklight package:

$ Sudo apt-get install xbacklight

You can then adjust the settings from a terminal using commands found here.

To increase brightness by 20%:

$ sudo xbacklight -inc 20

Alternatively to decrease:

$ sudo xbacklight -dec 20

Or use the -set parameter to define the exact level:

$ sudo xbacklight -set 50

If this works for you may want to add a new startup entry so it runs on boot. Open "Startup Applications" and add the following details:

Name: Brightness

Command: xbacklight -set 60

Click add and you are done! Hope this helps.