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I can't change the screen brightness on my laptop (Asus G53JW) with 12.10 installed. I have tried many ways to solve the problem, but nothing worked. I tried to edit grub with acpi_vendor and acpi_osi (I have tried all the combinations found on the ubuntu.org forum but still I can't change it. I even tried to add in xorg.conf the string:

Option “RegistryDwords” “EnableBrightnessControl=1″

Nothing changed. The only way to get it to work is to use nvidiabl but I have flickering problems with it and I'd like to find a way to solve the problem without external modules like nvidiabl.

Mochan
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sixpounder0302
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3 Answers3

1

I have an Acer Aspire S7-191, installed Ubuntu 14-04 LTS. The brightness control, using the keyboard function keys, did not work The following process resolved this issue:

  1. Open Terminal with Ctrl + Alt + T
  2. Type sudo -H gedit /etc/default/grub
  3. change the line which reads GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
  4. Save and Close gedit.
  5. Then update Grub with sudo update-grub
  6. Then re-start
Zanna
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Mr. Kim
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0

Install Brightness Controller with the following commands:

sudo add-apt-repository ppa:apandada1/brightness-controller
sudo apt-get update
sudo apt-get install brightness-controller

You can control brightness using its slider.

enter image description here

Archisman Panigrahi
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-2

I had the same problem, and found this:

xrandr --output LVDS1 --brightness "X"

Where X is between 1 (full brightness) and 0 (backlight off) Hope it helps :)

Eric Carvalho
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bewinche
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