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Thread: How can I adjust screen brightness in OpenSUSE-LXDE???

  1. #1
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    Question How can I adjust screen brightness in OpenSUSE-LXDE???

    I use OpenSUSE-LXDE 11.3 for my laptop Dell Inspiron N4010. Everything is good but I can't adjust brightness to save power for my laptop .
    I can use function key on my keyboard, the ruler of brightness show and change but brightness don't change . And I have tried using laptop-mode-tool but result don't improve
    How can I do it????

    P/S I'm Vietnamese and my english is bad

  2. #2

    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Quote Originally Posted by FirePhoenix View Post
    How can I do it????
    Had the same problem, gladly fixed it with these steps of 1,2,3,4,5,6

    1. Go to YaST
    2. Choose "System" at left panel
    3. Choose "Boot Loader" at right panel
    4. At "Boot Loader Settings", choose the openSuSe partition/label then "edit"
    5. At "Optional Kernel Command Line Parameter",

    add
    acpi_osi=Linux
    to the end of the textbox.

    mine, looks like this
    resume=/dev/disk/by-id/ata-Hitachi_HTS545032B9A300_100218PBN3041THNNKHR-part6 splash=silent quiet showopts acpi_osi=Linux
    6. "OK" , then restart the computer
    7. Then, tell me if it works for you :-) or
    8. Ask me if any step above is not clear :-)

    It works for me, hope will be for you too ( if y have not found a fix yet)

    I used both Ubuntu 10.10 & OpenSuSe 11.3 KDE , the solution works for both for my same Acer laptop :-)

    Quote Originally Posted by FirePhoenix View Post
    P/S I'm Vietnamese and my english is bad
    I thought it was good ! :-)

    source - [ubuntu] Brightness problem in Ubuntu 9.10 on Acer Extensa 5235 - Ubuntu Forums

  3. #3
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    Unhappy Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    @ANewSon Thanks for your helping, I'll try it a.s.a.p but not now because my laptop have broken down. By the day, it's haven't been repaired.
    When it's repaired and i can use it, i'll try your instruction and say result to everyone who get this problem .

  4. #4
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Very bad, it don't work for me .

  5. #5
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    There is a command xbacklight which works from a terminal as normal user. Worth investigating at least. From the man page:
    Xbacklight is used to adjust the backlight brightness where supported. It finds all outputs on the X server supporting backlight brightness control and changes them all in the same way.
    Use the command xbacklight --help for help with parameters:
    Code:
    usage: xbacklight [options]
      where options are:
      -display <display> or -d <display>
      -help
      -set <percentage> or = <percentage>
      -inc <percentage> or + <percentage>
      -dec <percentage> or - <percentage>
      -get
      -time <fade time in milliseconds>
      -steps <number of steps in fade>
    Let us know if it workS for you, or post back with any further questions.

  6. #6

    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Please try this old thread, it might help.
    See the part of thread with "xgamma"

    http://forums.opensuse.org/english/g...ess-gnome.html
    People who do not break things first will never learn to create anything

  7. #7
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Quote Originally Posted by consused View Post
    There is a command xbacklight which works from a terminal as normal user. Worth investigating at least. From the man page:
    Xbacklight is used to adjust the backlight brightness where supported. It finds all outputs on the X server supporting backlight brightness control and changes them all in the same way.
    Use the command xbacklight --help for help with parameters:
    Code:
    usage: xbacklight [options]
      where options are:
      -display <display> or -d <display>
      -help
      -set <percentage> or = <percentage>
      -inc <percentage> or + <percentage>
      -dec <percentage> or - <percentage>
      -get
      -time <fade time in milliseconds>
      -steps <number of steps in fade>
    Let us know if it workS for you, or post back with any further questions.
    I try to use it and i get error: No outputs have backlight property. What?????
    My "brightness" file in location: /sys/class/backlight/dell_backlight/. I changed value in it and but when i restart my laptop, value is reseted .
    @conram I think xgamma only change colors-dept, not brightness >"<. Felling darker because your colors-dept changed, but brightness doesn't change.

  8. #8
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Quote Originally Posted by FirePhoenix View Post
    I try to use it and i get error: No outputs have backlight property. What?????
    My "brightness" file in location: /sys/class/backlight/dell_backlight/. I changed value in it and but when i restart my laptop, value is reseted...
    That command worked on my notebook (Lenovo), but the backlight setting also gets reset on restart.

    On mine I have /sys/class/backlight/acpi_video/ directory with three further sub-directories, and several files including actual_brightness, brightness, and max_brightness . My notebook currently relies on standard ACPI kernel modules for its backlight controls which work through the ACPI video module.

    To see if that module is loaded on your system, you can use the following command (as normal user):
    Code:
    lsmod | grep video
    Look for "video" module in the listed output. The module names to the right show which other modules are using it.

    Alternatively, your laptop may be using a custom ACPI package for your make/model.

  9. #9
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    Not just a problem on openSUSE, take a look at this post from Ubuntu's forum.

  10. #10
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    Default Re: How can I adjust screen brightness in OpenSUSE-LXDE???

    This problem seem to be serious
    Result got when i type lsmod | grep video in terminal
    Code:
    FirePhoenix@firephoenix:~> lsmod | grep video
    uvcvideo               68119  0 
    videodev               43828  1 uvcvideo
    v4l1_compat            17249  2 uvcvideo,videodev
    v4l2_compat_ioctl32    11349  1 videodev
    video                  25256  1 i915
    thermal_sys            18230  4 video,fan,processor,thermal
    No idea in topics which you post can help me solve my problem
    My kernel's version
    Code:
    FirePhoenix@firephoenix:~> uname -a
    Linux firephoenix.site 2.6.34.7-0.5-desktop #1 SMP PREEMPT 2010-10-25 08:40:12 +0200 x86_64 x86_64 x86_64 GNU/Linux
    My location /sys/class/backlight/dell_backlight/ included folders and files as same as you
    I hope this problem will be solved in OpenSUSE 11.4

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