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I use ubuntu 11.10 64bit on my Hp dv6 6080 laptop. i have problem in ubuntu 1) i can't adjust lcd brightness in ubuntu with brightness keys. how can i adjust lcd brightness because lcd brightness Offend my eyes. please help me

2)I can't switch to projector with switch button above buttons work on win7 but i can't use them on Ubuntu!

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closed as too localized by James Feb 27 '12 at 23:29

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

No one can help me? – Taher Nov 3 '11 at 14:07
This question appears to be abandoned, if you are experiencing a similar issue please ask a new question with details pertaining to your problem. If you feel this question is not abandoned, please flag the question explaining that. :) – Ringtail Feb 27 '12 at 23:17

That solution works for me too. I have Ubuntu 11.10 and Laptop HP PAVILION DV6

Too make things easier I created a script:

current_brightness=`cat /sys/class/backlight/intel_backlight/brightness`
echo current_brightness = $current_brightness

if [ "$1" = "+" ]
    new_brightness=`expr $current_brightness + $steep`

if [ "$1" = "-" ]
    new_brightness=`expr $current_brightness - $steep`

echo new_brightness = $new_brightness

echo $new_brightness | tee $brightness_file

One drawback here you have to open brightness_file for write to anyone: sudo chmod 666 brightness_file

Then put the script in a file. For example and you can change brightness with commands + or -

To make even better you can allocate shortcuts on the same f2 f3 keys.

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There's a stupid bug in Ubuntu 11.04 and later with NVidia chipsets, GPU's. For some GPU's, you can use the package smartdimmer.

sudo apt-get install smartdimmer 

After that smartdimmer -s <level>. Use the numbers 25-100.

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For the other question, the one with the display key, take a look at Disper:

It's quite an ugly solution, but it's the only one that worked for me in the past (though with a different laptop).

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worked fine for me on Ubuntu 11.10 and HP Pavilion dv6.

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I'm using Arch Linux with KDE, but had the same problem (dv6 laptop as well, with hybrid Intel / ATI graphics).

I solved it by adding this to the kernel startup line in grub.cfg / grub.lst or whatever it' s called in Ubuntu:


Not sure if this works in Ubuntu though.

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