lightum: auto adjust keyboard brightness on Linux MacBook

If you are running Linux on your MacBookAir and want the keyboard light brightness changed automatically depending on the ambient light (just as OS X does), continue reading.

I’ve written a small daemon named lightum, source is on github and licensed under GPL-2+.

Usage:  lightum [-m value] [-p value] [-f]
        -m 0..255 : maximum brightness value between 1 and 255 (default=255)
        -p num    : number of seconds between light sensor polls (default=8)
        -f        : run in foreground (do not daemonize)
        -v        : verbose mode, useful for debugging with -f

For it to work you need dbus installed, and your MacBook should have the light sensor located in /sys/devices/platform/applesmc.768/light (should be available on all MacBookAir and MacBookPro versions which have a backlight on keyboard, as far as I know).

If you are running Ubuntu, you can install it by adding lightum-mba ppa to your system:

sudo add-apt-repository ppa:poliva/lightum-mba
sudo apt-get update
sudo apt-get install lightum

Otherwise, you can build it from source.

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51 Responses to lightum: auto adjust keyboard brightness on Linux MacBook

  1. Ryan says:

    I just wanted to say thanks for this. I’m using it with Arch Linux on my MacBook Pro 8,2 and it works perfectly. I installed lightum from source and put the binary in my path, then added ‘lightum’ as a startup program in xfce4 – nothing to it. :) Now can someone please figure out how to adjust screen brightness on a Macbook Pro 8,2 in GNU/Linux?

  2. Sergio Rubio says:

    Yeah, works like a charm. Thanks!

    Forward ported the package in you PPA to Ubuntu Precise. No problem whatsoever.

  3. matteo says:

    are you going to implement also video brightness control?

    • pof says:

      most desktop environments already have mechanism in place for that, adding this to lightum will probably interfere with it.

      • seb says:

        I think, the question was “Are you going to implement also automatic video brightness control depending on the ambient light ?”
        I’m interesting too.

        Thank you for your job ;)

  4. pof says:

    New version with initial screen backlight support is now on github, please test it :)

  5. pof says:

    Just published lightum version 2.0, with screen backlight support:

  6. Christoph says:

    Thank you!
    Would it be possible to change the minimum brightness by pressing F2 or F6 so that lightum doesn’t dimm the light under this level?
    For example when I want to look a video I put the brightness of maximum by pressing the F2. At the moment lightum automatically dimms the brightness and I can’t set a dynamical minimum brightness.

    • pof says:

      Currently you can dynamically change the maximum brightness value using the function keys if you add the option ‘ignoreuser=0′ in the config file. An option that would probably suit you more is switching to manual mode instead of auto mode while viewing the video, you can use the lightum-indicator applet to do this in a quick & comfortable way.

      • Christoph says:

        Hi pof,
        thank you but when I use the function keys in ignoreuser=0 mode lightum doesn’t accept it and change the brightness again.
        The indicator seems to be very nice but it doesn’t work here. I can’t change the accommondation with the applet. Maybe something with the right from lightum.conf?
        Thanks!

        • pof says:

          I’ve pushed some changes into the git repo, should fix your problems with ignoreuser setting, please test if you can.

          Regarding the indicator, what is it that’s not working? can you open a bug report?

          • Christoph says:

            Yeah now it works great!
            The problem with the indicator was that owner of the file .config/lightum was root so that the indicator wasn’t able to write the lightum.conf.
            Thank again for this good work!

  7. sidthesloth says:

    hey, this is awesome what you did!!!
    i am going to install your program/package on my 2007 MacBook Pro (3,1) which now runs CentOS 6.2.
    i will write back about how it went.
    thanks.

    • pof says:

      Good to hear that! let me know if you find any bugs :)

      • sidthesloth says:

        Trying to compile the source from git:

        [sid@alpha poliva-lightum-d1922f8]# which gcc
        /usr/bin/gcc
        [sid@alpha poliva-lightum-d1922f8]# gcc –version
        gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)
        Copyright (C) 2010 Free Software Foundation, Inc.
        This is free software; see the source for copying conditions. There is NO
        warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
        [sid@alpha poliva-lightum-d1922f8]# gcc lightum.c -o lightumd
        In file included from lightum.c:26:
        lightum.h:1:22: error: X11/Xlib.h: No such file or directory
        lightum.h:2:37: error: dbus/dbus-glib-lowlevel.h: No such file or directory
        In file included from lightum.c:26:
        lightum.h:30: error: expected ‘)’ before ‘*’ token
        lightum.h:40: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
        lightum.h:41: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
        lightum.h:42: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
        lightum.h:43: error: expected ‘)’ before ‘*’ token
        lightum.c: In function ‘main’:
        lightum.c:62: error: ‘Display’ undeclared (first use in this function)
        lightum.c:62: error: (Each undeclared identifier is reported only once
        lightum.c:62: error: for each function it appears in.)
        lightum.c:62: error: ‘display’ undeclared (first use in this function)
        lightum.c:63: error: ‘DBusGConnection’ undeclared (first use in this function)
        lightum.c:63: error: ‘connection’ undeclared (first use in this function)
        lightum.c:64: error: ‘DBusGProxy’ undeclared (first use in this function)
        lightum.c:64: error: ‘proxy_manager’ undeclared (first use in this function)
        lightum.c:65: error: ‘proxy_session’ undeclared (first use in this function)

        I even tried to compile is with cc, it yields the same result.

        Could someone enlighten me, please?
        Thanks!

        • pof says:

          To compile it just run “make” on the source directory, you need to have the build time dependencies installed:
          autotools-dev, pkg-config, libdbus-1-dev, libdbus-glib-1-dev, libxss-dev.

          • sidthesloth says:

            thanks for the prompt answer, pof!

            i suppose i can’t install any “libdbus-1″. on CentOS 6.2 i have:
            dbus-glib-devel-0.86-5.el6.x86_64.rpm

            here’s what i figured are the equivalents (used yum search) to the packages you listed above for me:

            # yum install dbus-c++-devel dbus-python-devel dbus-qt-devel dbus dbus-c++ dbus-devel dbus-glib dbus-glib-devel dbus-libs dbus-qt dbus-x11
            # yum search autotools
            # yum install mk-configure xorg-x11-util-macros
            # yum install pkgconfig
            # yum search libxss
            # yum install libXScrnSaver

            still, i get this after running make:

            [sid@alpha poliva-lightum-d1922f8]$ make
            cc `pkg-config –cflags dbus-1 –cflags dbus-glib-1` -Wall -Wextra -Wwrite-strings -O -g -c -o functions.o functions.c
            functions.c:17:38: error: X11/extensions/scrnsaver.h: No such file or directory
            functions.c: In function ‘get_session_idle_time’:
            functions.c:240: error: ‘XScreenSaverInfo’ undeclared (first use in this function)
            functions.c:240: error: (Each undeclared identifier is reported only once
            functions.c:240: error: for each function it appears in.)
            functions.c:240: error: expected ‘;’ before ‘info’
            functions.c:243: warning: implicit declaration of function ‘XScreenSaverQueryInfo’
            functions.c:243: error: ‘info’ undeclared (first use in this function)
            make: *** [functions.o] Error 1

            i appreciate the help…

  8. pof says:

    @sidthesloth: you need to ‘yum install libXScrnSaver-devel’ (notice the -devel), so you get the include files on your system.

    • sidthesloth says:

      @pof: thanks, that made it. i was able to compile it. done “# make install”. ran it in the console:

      lightum -f -v

      gives:

      Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist
      light_sensor: 21 idle_time: 1.528000 auto mode brightness: 6 backlight: 7

      :~[

      • pof says:

        can you try again with the last version from git? i’ve done a few changes in the code today. Also, which window manager are you using?

        • sidthesloth says:

          i will try again with latest code from git.
          i am running CentOS 6.2 with Gnome2 and Metacity.

  9. sidthesloth says:

    pof,

    i compile again from git. i ran it in manual mode this time, and i pressed the F9 and F10 keys (the hardware brightness keys). here’s how it looks:

    [sid@gamma zzzz]$ lightum -x -f -v
    CONFIG:
    manualmode: 1
    ignoreuser: 1
    workmode: 3
    queryscreensaver: 0
    maxbrightness: 255
    minbrightness: 0
    maxbacklight: 15
    minbacklight: 1
    polltime: 300
    idleoff: 5
    screenidle: 30

    lightum v2.0.4 running in manual mode
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    idle_time: 0.026000 manual mode brightness: 0 backlight: 0
    idle_time: 0.362000 manual mode brightness: 0 backlight: 0
    idle_time: 0.664000 manual mode brightness: 0 backlight: 0
    idle_time: 0.965000 manual mode brightness: 0 backlight: 0
    idle_time: 1.267000 manual mode brightness: 0 backlight: 0
    idle_time: 1.568000 manual mode brightness: 0 backlight: 0
    idle_time: 1.870000 manual mode brightness: 0 backlight: 0
    idle_time: 2.172000 manual mode brightness: 0 backlight: 0
    idle_time: 0.052000 manual mode brightness: 0 backlight: 0

    ==============================
    then, this is what i get when running it in automatic mode:

    [ds@gamma Downloads]$ lightum -f -v
    CONFIG:
    manualmode: 0
    ignoreuser: 1
    workmode: 3
    queryscreensaver: 0
    maxbrightness: 255
    minbrightness: 0
    maxbacklight: 15
    minbacklight: 1
    polltime: 300
    idleoff: 5
    screenidle: 30

    lightum v2.0.4 running in auto mode
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    light_sensor: 42 idle_time: 0.020000 auto mode brightness: 3 backlight: 9
    light_sensor: 44 idle_time: 0.411000 auto mode brightness: 2 backlight: 9 -> Ignoring user brightness change, wants to set maxbrightness to 0
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    light_sensor: 67 idle_time: 1.147000 auto mode brightness: 1 backlight: 13 -> Ignoring user brightness change, wants to set maxbrightness to 0
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “GetPercentage” with signature “” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system
    Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files
    Can’t manage screen backlight on this system

    • pof says:

      can you get/set the screen backlight values using dbus-send ? for an example on kde or gnome look at this script:
      http://pastebin.com/iPwstE4H

      Also, please post the output of the following command:

      qdbus org.gnome.SettingsDaemon /org/gnome/SettingsDaemon/Power

      • sidthesloth says:

        pof,

        here’s the command from your script in pastebin:
        [sid@gamma ~]$ dbus-send –session –print-reply –dest=”org.gnome.SettingsDaemon” /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.SetPercentage uint32:100

        Error org.freedesktop.DBus.Error.UnknownMethod: Method “SetPercentage” with signature “u” on interface “org.gnome.SettingsDaemon.Power.Screen” doesn’t exist

        …as for this command:
        qdbus org.gnome.SettingsDaemon /org/gnome/SettingsDaemon/Power

        it doesn’t output anything at all.

    • pof says:

      Please, instead of adding large comments here, open a bug report on github, and we can follow with the troubleshooting there. Please include in the bug report the output of the following commands too (run as root):

      # /usr/lib/gnome-settings-daemon/gsd-backlight-helper –get-max-brightness
      # /usr/lib/gnome-settings-daemon/gsd-backlight-helper –get-brightness
      # /usr/lib/gnome-settings-daemon/gsd-backlight-helper –set-brightness 10

  10. Hello Pau,
    I just would like to thank you for this project! Keep up the good work.

  11. Chris says:

    Great Work :D. is better than my garbage bash script.
    Any KDE integration/love?

  12. Bernd says:

    Wow, thank you very much for this.
    There is a small problem. I have installed fedora 17 on my macbook.
    Can this great package be built also for that distribution?
    How do you do that, first install gcc and then …?
    Thank you very much for any answer….

    Bernd

    • pof says:

      I have not packaged it in rpm, but you should be able to install it running ‘make && make install’ provided you have all the required build dependencies installed.

      • Bernd says:

        Thank you very much. I have tried to install the program with ‘make && make install’ but got some errors. So may be i have not installed all the build dependencies you mentioned.
        Seems that I have to find out first, what a build dependency is :)). I have not that much knowledge of programming with Gcc and even with Linux.
        My error was:
        [bernd@Nathan poliva-lightum-e7cc795]$ make && make install
        cc `pkg-config –cflags dbus-1 –cflags dbus-glib-1` -Wall -Wextra -Wwrite-strings -O -g -c -o functions.o functions.c
        Package dbus-1 was not found in the pkg-config search path.
        Perhaps you should add the directory containing `dbus-1.pc’
        to the PKG_CONFIG_PATH environment variable
        No package ‘dbus-1′ found
        Package dbus-glib-1 was not found in the pkg-config search path.
        Perhaps you should add the directory containing `dbus-glib-1.pc’
        to the PKG_CONFIG_PATH environment variable
        No package ‘dbus-glib-1′ found
        ….

        Seems that not all paths are defined correctly.

        • Bernd says:

          Finally I have succeeded in compiling the programm :)..

          But I directly got an error when I wanted to try the example:

          ** (lightum:3632): WARNING **: GetCurrentSession failed: The name org.freedesktop.ConsoleKit was not provided by any .service files

          (lightum:3632): GLib-CRITICAL **: g_variant_is_object_path: assertion `string != NULL’ failed

          ** (lightum:3632): CRITICAL **: dbus_g_proxy_new_for_name: assertion `g_variant_is_object_path (path)’ failed

          ** (lightum:3632): WARNING **: Could not get dbus session proxy

          So I have to figure out that now….

          • Bernd says:

            What is this for an error message?

            Unable to lookup session information for process ‘5275’

            Does anybody know that?

            Thank you for any answer…

  13. Grysnakh says:

    Thank you for your work.
    Am I blind, or there is not parameter for auto mode for cmd line?
    I am using Mint Maya with Cinnamon and there is some problem with indicator. Once I found it appeared on panel without icon. I set it on manual mode. After that applet disappeared and I could not force lightum to run in auto mode until conf file edited.
    Still indicator not appearing.

  14. Michael says:

    great tool. thank you very much!

    maybe an idea for a future version: if the macbook is connected to power, it would be useful to have an option to automatically deactivate dimming.

  15. Carlos says:

    Nice program! Thank you very much!

    I’ve just compiled the sources from git and it seems to work. I’m just slightly annoyed by the these messages:
    [mafra@linux-ahr8:lightum]$ Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SettingsDaemon was not provided by any .service files
    Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.kde.Solid.PowerManagement was not provided by any .service files

    sh: $’04′: command not found
    sh: $’01′: command not found
    sh: $’01′: command not found
    sh: $’01′: command not found

    and it goes one like this forever.

    I assume it’s because I’m using WindowMaker, but I’m not sure where those messages are comming from.

    Do you know what’s going on? Any help is appreaciated.

    • Carlos says:

      The above infinite repetition of

      sh: $’04′: command not found

      is due to the broken function set_screen_xbacklight_value() in xbacklight.c which is called if the
      neither Gnome nor KDE is detected. Since I’m using Window Maker, that’s the case for me.

      That function even has a printf(“%s”, name) for a totally undefined ‘name’ and I suspect that my problems to suspend to RAM were related to running lightum because of that function. In any case, deleting its content fixes things for me.

  16. neil says:

    i tried to install this, through terminal, but the package can’t be found…

    please fix.

    thanks!

  17. J says:

    This doesn’t seem to be fetchable from the repository anymore (Ubuntu). Is there another way to install this?

    W: Failed to fetch http://ppa.launchpad.net/poliva/lightum-mba/ubuntu/dists/quantal/main/source/Sources 404 Not Found

    W: Failed to fetch http://ppa.launchpad.net/poliva/lightum-mba/ubuntu/dists/quantal/main/binary-amd64/Packages 404 Not Found

    W: Failed to fetch http://ppa.launchpad.net/poliva/lightum-mba/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found

    E: Some index files failed to download. They have been ignored, or old ones used instead.

    sudo apt-get install lightum
    Reading package lists… Done
    Building dependency tree
    Reading state information… Done
    E: Unable to locate package lightum

  18. Chris says:

    Built from source on Arch Linux running Awesome WM. I notice there is some dependencies on gnome/kde services. Could you point me in the right direction to get this running without gnome/kde? I.e. is there some alternative settings and power management daemons that only depend on x11?

  19. Gell says:

    Thanks for writing this! Safes me a lot of battery! :-)

    Gell

  20. BulletproofMilk says:

    Worked great until upgrate to Ubuntu 13.10. Is there any way to get it to work again?

  21. Brian Harkness says:

    I built this from source on ubuntu 14.04 and it built fine with no errors.

    I get this when I run it

    #$ lightum
    lightum v2.3.1 running in auto mode forked into background

    ** (lightum:20246): WARNING **: GetCurrentSession failed: Unable to lookup session information for process ‘20246’

    (lightum:20246): GLib-CRITICAL **: g_variant_is_object_path: assertion ‘string != NULL’ failed

    ** (lightum:20246): CRITICAL **: dbus_g_proxy_new_for_name: assertion ‘g_variant_is_object_path (path)’ failed

    ** (lightum:20246): WARNING **: Could not get dbus session proxy

  22. pranay says:

    Thanks a ton…do you accept bitcoins :)

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