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want to control the brightness (which is by default set to 100%). I want to lower it down because its killing my battery life and drains it out in matters of seconds. I cannot control the brightness using fn keys and other control provided in backtrack 5 o/s.

Information:

  • Ubuntu Description: Ubuntu 10.04.2 LTS Release: 10.04 Codename: lucid

  • Model Inspiron N5110

  • kernel Linux bt 2.6.39.4

lsmod | grep dell:

dell_rbu                5691  0 
dell_wmi                1413  0 
sparse_keymap           3194  1 dell_wmi
dell_laptop             7700  0 
wmi                     8772  1 dell_wmi
dcdbas                  5557  1 dell_laptop
rfkill                 14987  3 dell_laptop,cfg80211,bluetooth
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2 Answers 2

switch to latest release 11.10 I am using it no problems so far all Fn keys brightess touch pad volume are working a ok.

I own Dell N5110 and using it as my primary machine with ubuntu 11.10

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If you run

lsmod | grep dell

Do you see "dell-laptop" and "dell-wmi" there?

If not, try to modprobe them:

sudo modprobe dell-laptop dell-wmi
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ok let me past the output –  asadz Nov 9 '11 at 15:35
    
Hmm, what kind of graphics card do you have? lspci | grep VGA –  Chris Wayne Nov 9 '11 at 16:46
    
lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: nVidia Corporation Device 0df5 (rev a1) –  asadz Nov 9 '11 at 17:01

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