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    [ubuntu] Re: LCD backlight brightness (8.04)

    Open the file /boot/grub/menu.lst with your favorite editor. Somewhere in the middle of the file there should be a line that starts with "kernel /boot/"... This is the kernel line that I meant. There...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    "Good news, everyone..."

    Playing with the options explained here http://www.columbia.edu/~ariel/acpi/acpi_howto.txt I finally managed to get it done!

    I added the boot option acpi_osi= to my...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    Does anyone of you know another way to single down the cause of this problem to a certain source? Or can I obtain the source of the acpi packages somewhere?
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    [ubuntu] Re: LCD backlight brightness (8.04)

    Is there anything else I could provide as info? Or a workaround that I haven't mentioned yet? That's the only issue left on my laptop.
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    [ubuntu] Re: LCD backlight brightness (8.04)

    This sounds unrelated as my brightness issue is something to do with ACPI, I assume. It didn't work before setting up frequency scaling at all and the brightness controls stop functioning in the very...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    I filed a bug now containing all information I could get:

    https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/279163
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    [ubuntu] Re: LCD backlight brightness (8.04)

    There is no such setting in my BIOS. It is quite crippled, can only change the time and the boot order but not much else...

    The brightness_switch_enabled file has no effect on it.
    Booting with...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    Hi Xubcel, thanks for your comment on this. I was afraid I would be doing monologues forever... :)

    I checked the website and it explains the same fix (but in a script) that didn't work on my...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    Ok, I've collected lots of information that I hope someone can find useful. These are all "brightness" files on my system:

    /sys/class/backlight/acpi_video0/brightness
    contains only "7"; could be...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    BUMP.

    It seems that this is nothing to do with Fn-keys after all, but with some other kind of problem. When directly writing a brightness value to the file, there is no change in the display's...
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    [ubuntu] Re: LCD backlight brightness (8.04)

    What information can I provide to help you help me?
    Does anyone else face this problem?
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    [ubuntu] [SOLVED] LCD backlight brightness (8.04)

    ALOHA!

    I've been reading every single entry on LCD backlight issues I could find and since nothing helped solving the problem I would like to ask for help again.

    Using the brightness hotkeys of...
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