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Thread: Pommed and backlight in intrepid

  1. #1
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    Pommed and backlight in intrepid

    Hi,
    I am a bit confused about pommed and display backlight on my macbook pro 3,1 using intrepid.

    The hotkeys do nothing, which I had read about in various other threads (dim backlight is mapped to "XF86Stop" according to xev).
    Other threads also discussed this giving the solution not to use pommed but gnome-power-manager, wich I obviouslly can not do with kubuntu.
    Kde power manager does not manage to change the backlight in any way.
    So I came back to try pommed.
    I CAN CHANGE the backlight by unplugging power and even by changing the "init" value in /etc/pommed.conf and restart pommed ("/etc/init.d/pommed restart") but this seems to me a bit fiddly.
    I tried xbacklight but always get "No outputs have backlight property".
    How does pommed manage to change backlight? Can I do the same manually? Is there a way to repair pommed's broken hotkey mapping? Does kde offer a way I did not realize yet?

    Thanks
    LV

  2. #2
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    Re: Pommed and backlight in intrepid

    lv1001,

    From what I gather, the community is moving towards the use of Xorg XRandR, which has support for a broad range of graphics cards, backed up by kernel support. Both the gnome-power-manager and xbacklight use XRandR.

    As for pommed, much of its code seems to have been incorporated into this effort.

    Your model has nvidia graphics, has it not? Then there is a kernel module mbp_nvidia_bl to add to /etc/modules. This just might make xbacklight work.

  3. #3
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    Re: Pommed and backlight in intrepid

    and uninstall pommed no longer needed
    Constant development is the law of life, and a man who always tries to maintain his dogmas in order to appear consistent drives himself into a false position - Mahatma Gandhi

  4. #4
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    Re: Pommed and backlight in intrepid

    Thanks for your hints.
    As I had put it before, I had gone back to pommed because kde power manager did not work and after that already did the things stated in other posts (modify 10-macbookpro-utils.fdi, modprobe for mbp_nvidia_bl).
    Apparently I missed to check that kde power manager works after these steps just like gnome power manager does.
    I still can not set backlight via xbacklight but don't bother anymore.
    Nevertheless the hotkeys do not work wich is not that big a problem for me up to now.

    Again, thanks for your effort,
    LV

  5. #5
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    Lightbulb Re: Pommed and backlight in intrepid

    Hey, lv1001

    I know you're frustrated...It can be annoying. I've been there....

    Try this...

    open up a Terminal and type:

    Code:
    sudo gedit /etc/modules
    Type your password, and GEdit will open the Modules text file.

    At the very END of this file add the following:

    Code:
    mbp_nvidia_bl
    SAVE the file and reboot your computer. Let us know if this works for you so we can help you further if needed.

    Regards,
    MS

  6. #6
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    Re: Pommed and backlight in intrepid

    Sorry - should have read that you did this already. xD

    If you haven't already, use Synaptic Package Manager to make sure that you have xbacklight installed...

    Either way, the following post from kosumi68 was helpful to me:

    1. pommed is not needed, deinstall it to avoid confusion.

    2. you need the mbp_nvidia_bl kernel module installed in /etc/modules.

    3. hal might interfere: remove your macbook model from /usr/share/hal/fdi/policy/10osvendor/10-macbookpro-utils.fdi.

    4. LCD backlight should work automatically via gnome-power-manager which uses xrandr (same as xbacklight). Use the mactel version of g-p-m.

    5. Keyboard backlight works through the hal-applesmc package.

    Hopefully these things does it for you
    Last edited by kosumi68; 5 Days Ago at 01:58 PM.

  7. #7
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    Re: Pommed and backlight in intrepid

    Quote Originally Posted by MichaelSwengel View Post
    open up a Terminal and type:

    Code:
    sudo gedit /etc/modules
    Type your password, and GEdit will open the Modules text file.
    Just a nit-pick here. you should use gksudo to launch non-commandline apps with elevated privileges instead of sudo. Using sudo can break the function of some apps (firefox was one of those... at least in hardy).

  8. #8
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    Re: Pommed and backlight in intrepid

    Quote Originally Posted by cyberdork33 View Post
    Just a nit-pick here. you should use gksudo to launch non-commandline apps with elevated privileges instead of sudo. Using sudo can break the function of some apps (firefox was one of those... at least in hardy).
    I've never had a problem with gedit in 3 years....

    But if you say so...

  9. #9
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    Re: Pommed and backlight in intrepid

    Quote Originally Posted by MichaelSwengel View Post
    I've never had a problem with gedit in 3 years....

    But if you say so...
    Not saying that you will, but it is better practice to use the tools that you are supposed to use (i.e. do it the "right way"), especially when you are teaching someone else to do something (who might not be as careful with it as you).

    See here for more info:
    https://help.ubuntu.com/community/Ro...aphical%20sudo
    Last edited by cyberdork33; November 2nd, 2008 at 07:10 PM.

  10. #10
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    Re: Pommed and backlight in intrepid

    lcd backlight and keyboard backlight works with gnome but not with kde for me. any idea?
    Last edited by kjano; November 6th, 2008 at 06:58 PM.

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