Hardcore Linux

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Lenovo Brightness Key (Fn+Up/Down) Fix in Ubuntu 9.10

Recently I’ve discovered that my Lenovo G410’s  Brightness key (Fn + Up / Down) is not working in Ubuntu 9.10 which is previously fine in 9.04, and found out that there are various fix but the easiest is as follows:

1.  Modify your  grub.cfg

sudo vi /boot/grub/grub.cfg

2. Add  the word “nomodeset” on the end of the kernel options.

linux   /boot/vmlinuz-2.6.31 ...  quiet splash nomodeset

3. Then save the file and reboot the system.

4. Done.

4 responses to “Lenovo Brightness Key (Fn+Up/Down) Fix in Ubuntu 9.10

  1. toni January 18, 2010 at 4:53 pm

    you forgot to mention that you need to run “update-grub” afterwards…

    when booting without “nomodeset” then ubuntu starts (i can even hear the starting sound), but i get a black screen. with “nomodeset” everything works but the brightness…

    at least with: “sudo setpci -s 00:02.0 F4.B=66” (value between 00 and FF) i can adjust brightness…

    any ideas which script will be fired when hitting the brightness keys?
    using an “acer extensa 5235” with intel chipset…

  2. hardc0l2e January 19, 2010 at 5:08 am

    On my test, this works for Lenovo 3000 G400/G410, SL400. Haven’t tried on other laptops.

  3. rpd January 22, 2010 at 12:48 pm

    Hi folks,

    I’ve got a Lenovo 3000 N500 and experienced the same problem when updating from 9.04 to 9.10.
    I’ve followed the tip given above (add nomodeset to /boot/grub/menu.lst and run update-grub) and now ALL the FN keys are working fine.
    Great tip!

  4. Tarun December 1, 2010 at 3:41 am

    I have lenovo 3000 g430 laptop and i am unable to enable wireless devices through fn+f5 in ubuntu 10.04,please give me a solution.

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