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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?

cl-netbox
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Andhiku
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1 Answers1

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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.

Drp RD
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  • @Ands, please if any of this helped you in the any way either accept this as answer or post update about the problem. Or even down-vote, but do not keep this unanswered. Thanks! – Drp RD Apr 29 '15 at 03:09
  • I had the similar issue on my Acer Aspire ES-521 in Ubuntu 14.04. I could not adjust brightness via Fn + ← / → hotkeys. I've just installed fglrx package. After that hotkeys started functioning properly.

    Of course, installation of additional packages can lead to even more issues. But it's pretty easy to login without GUI and remove those packages (as long as you remember names of the packages or have log/notes about the latest manipulations with apt-get).

     – flaz14 May 01 '18 at 16:21