Brightness controls not working on a Sony Vaio VPCEH38FN

Question

I have ubuntu 12.04 installed on windows 7. When I use the Fn alongside the key to reduce brightness, or even using the system settings, I am not being able to reduce the screen brightness. What is the problem?

score 3 · Answer 1 · edited Oct 05 '12 at 22:51

3

Run:

sudo gedit /etc/default/grub

Update these lines:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

... with the following arguments:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_osi=Linux"

Then run sudo update-grub and reboot.

edited Oct 05 '12 at 22:51

Eliran Malka

1,245
18
36

answered Jun 10 '12 at 12:35

Zumy

31

score 1 · Answer 2 · edited Aug 06 '12 at 03:57

1

I have a SONY VPCEG Vaio and to manipulate brightness in Ubuntu. Based on a article that I lost, I use this:

https://github.com/ricardodani/sony-vpc-brightness-linux/blob/master/bright.py

edited Aug 06 '12 at 03:57

Eliah Kagan

119,640

answered Aug 06 '12 at 02:30

Ricardo

111

score 1 · Answer 3 · edited Jul 30 '13 at 14:55

Here's how i fixed mine :

LCD Brightness Control

Once you have installed the proprietary Nvidia drivers as suggested above, you may notice that your brightness control keys do not work properly. This is fixable by editing one's xorg.conf file. Open a terminal window and type the following:

sudo nano /etc/X11/xorg.conf

This will open your X server configuration (after prompting for your password). You should see a section titled "Device" that looks as follows:

Section "Device"
        Identifier      "Default Device"
        Driver  "nvidia"
        Option  "NoLogo"        "True"
EndSection

Append a line so it appears like this:

Section "Device"
        Identifier      "Default Device"
        Driver  "nvidia"
        Option  "NoLogo"        "True"
        Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection

You will need to restart your graphical server (or reboot) for this change to take effect.

score 0 · Answer 4 · edited Aug 06 '12 at 04:00

I had the same problem and I solved it as follows.

This page shows how to set up the 3D cube and I am enclosing it because I used the same tool: CompizConfig Settings Manager.

That page tells you what to install and how to do it. Once it's installed, open CompizConfig Settings Manager, go to Accessibility > Opacity. Click on the Brightness and Saturation/*Brightness* tab.

Enable "Increase and Decrease Brightness" and set the key combination for it. Be careful. CompizConfig Settings Manager is a very powerful tool and if you don't know what you are doing, you may damage your Ubuntu system.

I would have posted screenshots but it is prohibited to new users. It is fairly simply though.

deostroll · Answer 5 · 2012-06-19T14:49:33.980

0

There is an app for it...Brightness And Lock

enter image description here

edited Jun 19 '12 at 14:49

answered Jun 19 '12 at 14:31

deostroll

1,769

score 0 · Answer 6 · answered Sep 13 '12 at 12:19

0

I have a SONY Vaio E15 ( E15113 ) and was able to solve the problem using the solution mentioned in an earlier post

https://github.com/ricardodani/sony-vpc-brightness-linux/blob/master/bright.py

answered Sep 13 '12 at 12:19

user89349

1

Brightness controls not working on a Sony Vaio VPCEH38FN

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