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Thread: lenovo G580 brightness control not working in ubuntu 12.04

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  1. #1
    Join Date
    Sep 2012
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    1

    lenovo G580 brightness control not working in ubuntu 12.04

    I recently purchased a lenovo G580 laptop. It does not have a separate graphics card.
    I also installed ubuntu and windows 7 64 bit . Lenovo provided a driver cd for windows 7. I installed all the drivers. The lenovo FN+up and down brightness control works fine in windows 7. But it does not work in Ubuntu. When I press the key combination, the brightness control appears and it shows the brightness is decreasing or increasing, but actually nothing happens. As i am new to linux, I did some search in the forums and found out two solution.
    1. changing the etc/default/grub file to modify the entry
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"
    2. changing the XOrg.conf file (which does not even exist in ubuntu 12.04)

    None of these worked for me. If you experts have any known solution, please share it with me.

    Thanks.

  2. #2
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    Hello and welcome to the forums.

    What kind of video card do you have? Try opening a terminal, running this command and posting back the results:
    Code:
    lspci  | grep VGA
    You may want to try the following kernel parameters instead of "acpi_backlight=video":

    - acpi_backlight=vendor
    - acpi_osi=
    - acpi_osi=Linux
    (Try them one at a time)

    And remember, that after everytime you change /etc/default/grub, you need to run:
    Code:
    sudo update-grub

  3. #3
    Join Date
    Mar 2012
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    3

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    I also had the same problem with my G580. Here's the method to make brightness work:
    Add
    Code:
    acpi_backlight=vendor
    to the
    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    and then reboot.
    Last edited by Berundo; October 3rd, 2012 at 12:20 PM.

  4. #4
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    Quote Originally Posted by Berundo View Post
    I also had the same problem with my G580. Here's the method to make brightness work:
    Add
    Code:
    acpi_backlight=vendor
    to the
    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    and then reboot.
    Hello Berundo and welcome to the forums. If I may make one addition to your solution, you also need to run:
    Code:
    sudo update-grub
    ...to make it work.

  5. #5
    Join Date
    Mar 2012
    Beans
    3

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    Quote Originally Posted by Toz View Post
    Hello Berundo and welcome to the forums. If I may make one addition to your solution, you also need to run:
    Code:
    sudo update-grub
    ...to make it work.
    Yes, of course. I forgot to mention about it . Thanks.

  6. #6
    Join Date
    Jun 2009
    Location
    Ohio
    Beans
    217
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    Sorry to re-open an older thread, but I just purchased this laptop and have been working to get everything functional. I couldn't get the brightness control to work.

    GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor" s followed by a grub update fixed this!

    Fixed the problem for me! Thank you very much! Since the OP didn't mark this thread as solved, I will state this is the fix.

    Thank you!


    00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)
    Last edited by Rifester; December 29th, 2012 at 06:12 PM. Reason: ADDED GRAPHICS CARD INFO

  7. #7
    Join Date
    Oct 2013
    Beans
    1

    Re: lenovo G580 brightness control not working in ubuntu 12.04

    Awesome,
    After huge hassle, finally.... This solution was life saver. (almost lost brightness sensor of my EYES....
    Step 1 : Edit
    /etc/default/grub to update with following,
    GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor"
    Step 2: Hit this command form terminal
    sudo update-grub

    and voilaa! its fixed!

    P.S: I am using Mint 15 64 bit and Lenovo G580

    Fixed the problem for me! Thank you very much!

    -Amon

    Thank you!
    Last edited by amon2; October 10th, 2013 at 01:38 PM.

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