Fn key to adjust brightness no long working in my Lubuntu

[Andre Campos Rodovalho]

Try to change it using commands, like those shown here:
http://askubuntu.com/questions/149054/how-to-change-lcd-brightness-from-command-line-or-via-script

This way you might be able to figure out if is a shortcut problem or
another problem...

2015-09-27 1:57 GMT-03:00 Marlon Ng <guikaye at gmail.com>:

> My laptop is running Lubuntu.  It used to have this file:
>
> /sys/class/backlight/acpi_video0/brightness
>
> but it's now replaced with this:
>
> /sys/class/backlight/samsung/brightness
>
> (in other words, the acpi_video folder is replaced with samsung folder)
>
> Now I can't used the Fn key + up or down arrow to adjust brightness.
>
> 1.  Is this due to recent updates?
>
> 2.  I recently installed another desktop environment in my Lubuntu, which
> proved to be buggy, so I uninstalled it.  I wonder if it has anything to do
> with Fn key not working?
>
> 3.  The Fn key + right or left arrow button to adjust sound works fine;
> only problem is the brightness adjustment (Fn + up or down arrow)
>
> Any ideas?
>
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