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Thread: Controlling brightness on 12.04 Toshiba L650

  1. #1
    Join Date
    Jul 2007
    Beans
    3

    Controlling brightness on 12.04 Toshiba L650

    Good evening everyone, I've just installed today Ubuntu 12.04 and I'm very happy with all the great features, there's only one problem I can't control the brightness of the screen.

    The fn keys works since the bar appears on the corner of the screen but it stays the same. Is there any way to fix this?


    Thanks in advance for helping out.

  2. #2
    Join Date
    Aug 2006
    Location
    Ireland
    Beans
    203
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: Controlling brightness on 12.04 Toshiba L650

    This is what worked for me:

    1) Edit /etc/default/grub and change this variable:
    GRUB_CMDLINE_LINUX="pcie_aspm=force acpi_osi=Linux acpi_backlight=legacy"
    2) Edit /etc/modprobe.d/blacklist.conf and add this line at the end of the file:
    blacklist toshiba_acpi
    3) Update the grub config file:
    sudo grub-mkconfig -o /boot/grub/grub.cfg
    Reboot and the problem should be gone.
    Good luck.
    Last edited by hexion; May 26th, 2012 at 06:19 PM. Reason: added missing quote

    - Ubuntu is an ancient african word meaning "I can't configure Debian"

  3. #3
    Join Date
    Nov 2010
    Beans
    3

    Smile Re: Controlling brightness on 12.04 Toshiba L650

    Quote Originally Posted by hexion View Post
    This is what worked for me:

    1) Edit /etc/default/grub and change this variable:


    2) Edit /etc/modprobe.d/blacklist.conf and add this line at the end of the file:


    3) Update the grub config file:


    Reboot and the problem should be gone.
    Good luck.
    Added another quote at the end of the 'GRUB etc' line.
    Works like a charm.
    Thanks
    Paul

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