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Thread: Changing brightness does not work in Ubuntu 11.10 after upgrading.

  1. #41
    Join Date
    Sep 2012
    Beans
    1

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Hi
    i have installed ubuntu 12.04 on my new lenovo g580 laptopt.this does not have any graphics card except intel hd 3000.i have tried the above solutions of adding the line acpi_backlight=vendor to the GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" line, in /etc/default/grub

    it does not work for me...

    kindly help.

    Thanks

  2. #42
    Join Date
    Apr 2012
    Beans
    21

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Quote Originally Posted by matt_symes View Post
    Hi

    Open a terminal and type

    Code:
    sudo nano /etc/default/grub
    Enter your password. It will not be echoed to the screen.

    Look for the line that says

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

    and change it so it says

    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
    Press ctrl + o to save and ctrl + x to exit.

    Then type

    Code:
    sudo update-grub
    Reboot your PC and check your function keys. Post back if it doesn't work.

    Edit: Just in case you missed it i have highlighted what you need to enter.

    Kind regards
    Helped me fix it. Thanks buddy

  3. #43
    Join Date
    Feb 2013
    Beans
    2

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Hi.
    Just installed 3d laptop with ubuntu 12.04. 1st was without problem. 2nd has problem with wifi. 3rd had problems with wifi and still has problem with dimming. On display it shows brightness bar, but don't change intensity of backlight.
    Here is the output from terminal:

    ance@ance-EasyNote-TE11HC:~$ ls /sys/class/backlight
    acpi_video0 intel_backlight
    ance@ance-EasyNote-TE11HC:~$ lsmod | grep video
    uvcvideo 67203 0
    videodev 86588 1 uvcvideo
    video 19068 1 i915
    ance@ance-EasyNote-TE11HC:~$ cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-3.2.0-37-generic-pae root=UUID=7339d58a-236e-49d4-8b88-bc73d443ab8b ro quiet splash vt.handoff=7


    Also tried to change grub. Didn't helped.

  4. #44
    Join Date
    Feb 2013
    Beans
    2

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Quote Originally Posted by dzincha View Post
    Hi.
    Just installed 3d laptop with ubuntu 12.04. 1st was without problem. 2nd has problem with wifi. 3rd had problems with wifi and still has problem with dimming. On display it shows brightness bar, but don't change intensity of backlight.
    Here is the output from terminal:

    ance@ance-EasyNote-TE11HC:~$ ls /sys/class/backlight
    acpi_video0 intel_backlight
    ance@ance-EasyNote-TE11HC:~$ lsmod | grep video
    uvcvideo 67203 0
    videodev 86588 1 uvcvideo
    video 19068 1 i915
    ance@ance-EasyNote-TE11HC:~$ cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-3.2.0-37-generic-pae root=UUID=7339d58a-236e-49d4-8b88-bc73d443ab8b ro quiet splash vt.handoff=7


    Also tried to change grub. Didn't helped.
    Just got update from update manager - restart - ok.
    During the day there were no any updates available.

  5. #45
    Join Date
    Apr 2013
    Beans
    4

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Hello, I have installed Ubuntu 12.04 and I have the same problem. I migrated from mac and even though I don't have all the basic knowledge in order to 'self install' everything I need yet, I believe the best way to do it is trying.

    To the lio, this is the output I get:

    username@computersname-MacBook:~$ ls /sys/class/backlight
    apple_backlight
    username@computersname-MacBook:~$ lsmod | grep video
    uvcvideo 72249 0
    videobuf2_core 32212 1 uvcvideo
    videodev 100265 2 uvcvideo,videobuf2_core
    videobuf2_vmalloc 12757 1 uvcvideo
    videobuf2_memops 13213 1 videobuf2_vmalloc
    username@computersname-MacBook:~$ cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-3.5.0-27-generic root=UUID=5f59014a-f5f9-4946-986d-652003df4751 ro quiet splash vt.handoff=7
    username@computersname-MacBook:~$ sudo nano ect/default/grub



    I tryied changing the grub and nothing and when I try 'sudo nano ect/default/grub' the file does not exist.

    I need some help with this please. Thank you

  6. #46
    Join Date
    Jul 2007
    Location
    Magic City of the Plains
    Beans
    Hidden!
    Distro
    Xubuntu 14.10 Utopic Unicorn

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    chessmate, you're more likely to get help if you start a new thread.

  7. #47
    Join Date
    Apr 2013
    Beans
    4

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    Thank you odos2er, I believe this thread is ended.?

  8. #48
    Join Date
    May 2013
    Beans
    24

    Re: Changing brightness does not work in Ubuntu 11.10 after upgrading.

    This worked for me(HP dv6 laptop)

    Thanks

    Hi

    Open a terminal and type

    Code:

    sudo nano /etc/default/grub
    Enter your password. It will not be echoed to the screen.

    Look for the line that says

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

    and change it so it says

    Code:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
    Press ctrl + o to save and ctrl + x to exit.

    Then type

    Code:

    sudo update-grub
    Reboot your PC and check your function keys. Post back if it doesn't work.

    Edit: Just in case you missed it i have highlighted what you need to enter.

    Kind regards
    Last edited by ThatNewGuy; June 1st, 2013 at 09:11 PM.

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