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Thread: Brightness on Macbook 7,1

  1. #1
    Join Date
    Jul 2006
    Location
    Chapel Hill, NC
    Beans
    61
    Distro
    Ubuntu 11.04 Natty Narwhal

    Brightness on Macbook 7,1

    Hello!

    I have a white Macbook 7,1 and am running 11.04 beta 1.

    I have worked out almost everything, sound being the main thing that didn't work. The one thing I don't have working is my brightness control -- my laptop always displays at 100%.

    I tried installing pommed and the dkms package from the Mactel PPA, but nothing works yet. The wiki hasn't been updated to 7,1 for Maverick, let alone Natty.

    Thanks for any help!

  2. #2
    Join Date
    Oct 2007
    Location
    Hoboken, NJ
    Beans
    39
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: Brightness on Macbook 7,1

    I also have this problem.

    Prior to enabling the nvidia driver, I could adjust the brightness while on battery, but not while on AC. Furthermore, while on battery the range was limited (could not go very bright) and re-plugging in the AC had no effect.

    Now, with the nvidia drivers installed, the screen brightness is STUCK at 100%. This is killing my eyes and my battery. I literally need to squint to use the screen.

    I have tried using some other solution suggested, but, nvclock tells me that my card is not supported. I tried "handy"'s C code, which returns "15" as my brightness but does not change the brightness. I have also tried pommed, but I get the following error:

    cmerck@Hades:~/backlight$ sudo pommed -f -d
    I: pommed v1.37 Apple laptops hotkeys handler
    I: Copyright (C) 2006-2011 Julien BLACHE <jb@jblache.org>
    pommed configuration:
    + General settings:
    fnmode: 1
    + sysfs backlight control:
    initial level: -1
    step: 1
    on_batt: 6
    + ATI X1600 backlight control:
    initial level: -1
    step: 10
    on_batt: 80
    + Intel GMA950 backlight control:
    initial level: 0xffffffff
    step: 0xf
    on_batt: 0x40
    + nVidia GeForce 8600M GT backlight control:
    initial level: -1
    step: 1
    on_batt: 6
    + Audio volume control:
    card: default
    initial volume: -1
    step: 10%
    beep: yes
    volume element: PCM
    speaker element: Front
    headphones element: Headphone
    + Keyboard backlight control:
    default level: 100
    step: 10
    auto on threshold: 20
    auto off threshold: 40
    auto enable: yes
    idle timer: 60s
    idle level: 0
    + CD eject:
    enabled: yes
    device: /dev/dvd
    + Beep:
    enabled: no
    beepfile: /usr/share/pommed/goutte.wav
    + Apple Remote IR Receiver:
    enabled: no
    DMI vendor name: [Apple Inc.]
    DMI product name: [MacBookPro7,1]
    I: DMI machine check: running on a MacBookPro7,1
    System: Linux 2.6.38-8-generic i686
    Failed to access brightness node: No such file or directory
    Failed to access brightness node: No such file or directory
    Failed to access brightness node: No such file or directory
    E: sysfs backlight probe failed, no fallback for this machine
    E: LCD backlight probe failed, check debug output

    cmerck@Hades:~/backlight$


    Any help would be greatly appreciated!

    -Chris

  3. #3
    Join Date
    Feb 2008
    Location
    Tegucigalpa -HN-CA
    Beans
    34
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Brightness on Macbook 7,1

    sudo apt-get install pommed work for my macbook 4,1

    but you can try this http://ubuntuforums.org/showthread.php?p=10583183#6
    Last edited by samuaz; May 15th, 2011 at 03:59 AM.

  4. #4
    Join Date
    Jul 2006
    Location
    Chapel Hill, NC
    Beans
    61
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Brightness on Macbook 7,1

    Whoops, forgot to update this thread. This fix worked for me:

    https://help.ubuntu.com/community/Ma...1/Natty#Screen

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