Question

6

Screen brightness not working

rated 0 times [ 6] [ 0] / answers: 1 / hits: 40122 / 1 Year ago, mon, may 1, 2023, 12:38:35

I use Ubuntu 12.04 on my Sony Vaio (VPCCW2HGX). At the first times, brightness control works well, but after the activating additional drivers (nvidia accelerated graphics driver) brightness control doesn't work. I searched this issue on so many Ubuntu and Linux forums, but solutions doesn't work. I tried these ways:

Installing xbacklight

Adding Option "RegistryDwords" "EnableBrightnessControl=1" to
/etc/X11/xorg.conf

Updating Nvidia drivers

To try to change brightness by typing sudo setpci -s 00:02.0 F4.B=xx

All of these ways doesn't work. I still can't set screen brightness. Is there anyone know this?

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enefiama

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4 Years ago

answered 1 Year ago heathree · Accepted Answer

I had the same problem with my Vaio and Ubuntu.

I got it working with the nvidiabl-module and the oBacklight script.

The script is available from this repository, and these instructions may be helpful.

Or use the newer DKMS-based way described in the README file. If you use that technique, you really should read that file thoroughly. However, one method that should work is to download a .deb file and install it. The project is inactive so nvidiabl-dkms_0.87_all.deb will likely remain the latest .debpackage. You can download and install that package with these two commands:

wget https://raw.githubusercontent.com/guillaumezin/nvidiabl/master/install/deb/nvidiabl-dkms_0.87_all.deb

sudo dpkg -i nvidiabl-dkms_0.87_all.deb

The README has information on other ways to install, as well as uninstalling.