Ubuntu: How should I control the brightness on my Ubuntu 14.04 system? [duplicate]


This question already has an answer here:

Brightness control button is changing brightness value in file /sys/class/backlight/acpi_video0/brightness, but screen brightness is not changing.


I think this app will work for you :) https://apps.ubuntu.com/cat/applications/trusty/brightness-controller/


Try this:

On your terminal:

    > gksudo gedit /etc/default/grub  Locate: GRUB_CMDLINE_LINUX=""  Change to: GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"    Then again in your terminal:  > sudo update-grub    

Reboot Computer. Now it should work !
Proven on my Packard Bell TS11HR Laptop !

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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