Set Brightness & Contrast?

kyak bas at
Sat Mar 30 07:28:40 EDT 2013

There is a 
which works kernel 3.3.8.

This file name however changes from kernel to kernel. For example, my file contains the following files as well:


There is also a file for contrast, i haven't tried using it though

On Sat, 30 Mar 2013, Lluís Batlle i Rossell wrote:

> On Sat, Mar 30, 2013 at 05:48:09AM +0000, Alexander Stephen Thomas Ross wrote:
>> I can't find any info. How does one change and/or set the brightness
>> or the contrast of the frame buffer and the console?
> I'm not any master on that, but I don't recall being able to tune the
> brightness or so. I remember touching something at /sys, and at most that could
> switch on and off the screen. But maybe it was only my lack of ability to do
> that.
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