How to adjust brightness on hp laptops in Gutsy

[olavjunior]

Thanks to Mike Lopez for making this litle script http://tech.mikelopez.info/2007/10/2...comment-112929

Here's how to:
Download the attached lcdbryt.sh

Run this from where you downloaded it to:
1. sudo cp lcdbryt.sh /usr/bin
2. sudo chmod +x /usr/bin/lcdbryt.sh
3. sudo gedit /etc/acpi/video_brightnessup.sh
1. add the following line at the end of the file
lcdbryt.sh up
2. save (Ctrl+s alt+F4)
4. sudo gedit /etc/acpi/video_brightnessdown.sh
1. add the following line at the end of the file
lcdbryt.sh dn
2. save (Ctrl+s alt+F4)


This should be it, now at least my Fn F6 & F7 works perfectly!

This also works great in Hardy! Enjoy

[tehsnipes]

can anyone confirm this??

[olavjunior]

I can confirm that it worked perfectly on my hp dv2130

[rufensis]

This worked perfectly on an HP Pavilion dv2000 laptop, too.

[Z_o-s-o]

The DV2000's arent supported out of the box?

The keyboard controls on my Dv6215 worked like a charm out of the box.

[olavjunior]

No, mine worked somewhat under Feisty, meaning it just went bright or dimmed. But didn't work at all under Gutsy (until now)

[rosegarden78]

You can hack a work-around by adjusting gamma correction which fixed my brightness problem on an overly-bright standard LCD display 1024x768 laptop at 86 ppi.

Make two shell scripts gc-up and gc-dn with a text editor in your /home directory

nano gc-up
#!/bin/sh
#gamma up
xgamma -gamma 1.0

nano gc-dn
#!/bin/sh
#gamma down
xgamma -gamma 0.75

chmod +x gc-up
chmod +x gc-dn

The commands above make the files executable. You can also do all this from the GUI with the right click. Finally add the scripts to keyboard shortcuts but you'll need to use Ctrl-F7 and Ctrl-F8 if the function key isn't detected in settings. Just type under command:

bash /home/gc-up
bash /home/gc-dn

And don't forget to set your key combination.

[tehsnipes]

thanks mates, it works like a charm

[olavjunior]

I tried adjusting the gamma, but that didn't give the right effect for me. The colors just got darker or something, not the backlight. The easy way to use gamma is

xgamma gamma 1.0 (or smaller..)

if you want to try

[tehsnipes]

Sticky this map, highly helpful and easy and should easily solve the problems for us noobs out here.

thanks so much man.