Thread: Brightness control using command

hi all,
using ubuntu 11.04 on netbook.
every time boot netbook , have reduce it's brightness pressing fn+f6. it's annoying , thing after days netbook's keyboard damaged. can tell me how can using command? make bash script , control it's brightness mouse click.thanks in advance.

there number of ways can done:

1. xbacklight (available in software centre)
example:

code:

xbacklight -set 50

...where 50 desired backlight %

2. setpci command - need know address of video card:

code:

lspci | grep vga

example:

code:

sudo setpci -s 00:02.0 f4.b=7f

...where 00:02.0 device id , 7f hexidecimal equivalent of brightness value want

3. echo brightness value directly backlight interface brightness file:
first, need identify backlight interface:

code:

ls /sys/class/backlight

...and 1 interface listed.
example:

code:

echo 5 | sudo tee /sys/class/backlight/intel_backlight/brightness

...where 5 value (between 0 , contents of /sys/class/backlight/intel_backlight/max_brightness) , /sys/class/backlight/intel_backlight/brightness backlight interface brightness file

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