Brightness doesn't work on acer aspire 4741

Please, can anybody help me ? Brightness doesn't work on Acer Aspire 4741.
I use Ubuntu 14.10 x64. The screen is too bright and very painful for my eyes.
Are there any suggestions for me to get a solution?

3

1 Answer

Yes @ Karl is right Brightness option is directly associated with What type of Graphic Card you have & after New Installation Process, by default keeps this "off" (that is low high can't be done. If you have Intel Graphics then: (To check the graphic card)

type this in Terminal:

ls /sys/class/backlight/

If its Intel, the answer would be:

computer_mfg_name intel_backlight

Then try this:

Open Terminal & type this to create a config file:

sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

Now we need to edit this file. You can use any editor be it a terminal one or graphical.

sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf

Add the following lines to this file:

Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0"
EndSection

Save it. Restart the Computer. The brightness control should be working through function keys now.

2

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