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Thread: Another another vaio brightness problem

  1. #1
    Join Date
    Feb 2014
    Beans
    1

    Unhappy Another another vaio brightness problem

    Dear Friends,

    I have a VPCS116FG vaio laptop and I installed ubuntu 12.04.4 on it. But my brightness is always at the maximum. Ichecked and searched many forums but unfortunately none of them worked for me including this way:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
    GRUB_CMDLINE_LINUX="acpi_osi=Linux"

    and many more ways but no luck so far.
    I think there might be a power control that all the time never let driver change the screen brightness.
    By the way, My Fn+bright keys are working and they do not change the actual brightness and it is all the time at the maximum.
    Could any one help me with this situation that my eyes are kind of hurting so much right now???

  2. #2
    Join Date
    Mar 2010
    Location
    India
    Beans
    7,371
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Another another vaio brightness problem

    Welcome to the fourms omid55!

    By the way, My Fn+bright keys are working and they do not change the actual brightness and it is all the time at the maximum.
    Do you mean the keys are NOT working? Because if the brightness is not changed, how do you consider them 'working'?

    Please open a terminal (Ctrl-Alt-T), and post back the outputs of following commands/script -
    Code:
    lsb_release -cd
    uname -mr
    cat /proc/cmdline
    lsmod
    for i in /sys/class/backlight/*; do echo -e "\n $i"; cat $i/{brightness,max_brightness,actual_brightness}; done
    While posting the outputs, please use 'Code' tags. It preserves the output's formatting and makes the post cleaner, compact and more readable. To see a quick 'HowTo' with screenshots, please follow the "Using Code Tags" link in my signature.
    Varun
    Help others by marking threads as [SOLVED], if they are. (See how)
    Wireless Script | Use Code Tags

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