Installing a Brightness Driver ( nvidiabl )
i installed the nvidiabl Driver from
because i cant control the display brightness on my notebook (its always at 100%).
So i opened the
file with Ubuntu Software Center and installed the package. After it was successfully installed, i tried to reduce the Brightness level with FN keys, but it doesnt work.
So i read, that i must add the line "nvidiabl" to /etc/modules.
I did this by typing sedo nano -w /etc/modules
I successfully added the line and rebooted. But i am still not able to change the screen Brightness, what do i have to do?
My Notebook is a Acer Aspire TimelineX 5830TG
Hope you can help :)
I just did this last night in Fedora 17x64 on a Lenovo T420 with nVidia drivers installed.
check your xorg.conf and add this line:
xorg.conf can be found in /etc/X11/
I recommend making a backup of the xorg.conf and add the above line between
Then restart the xserver or restart the system.
I do not have the computer from last night available at the time to print exactly where it goes but I remember it goes between the tags in xorg.conf.
Hope this helps.
I had the same problem on an HP laptop, and it was burning my retinas. I've tried the xorg.conf solution and a host of others, to no avail. I have an AMD/ATI card, but I might be able to help:
A couple options are to download and install Redshift (http://jonls.dk/redshift/).
Using the following command might work:
Anyways, because I adjust screen brightness every time I get on my computer, I wrote a Python script.
Just make sure you check and install the dependencies (see below), save the script to a file, chmod +x, and off you go.
If all this does not work you should take a look at /sys/class/backlight/acpi_video0/
there are files "actual_brightness", "max_brightness", "brightness"
Interesting question, though: If none of the known solutions are working on my system, how on God's green earth does Redshift work? Which values is Redshift altering?
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