Brightness control in FreeBSD 10.1-RELEASE

Avinash Sonawane rootkea at
Thu May 21 12:29:10 UTC 2015

On Thu, May 21, 2015 at 5:31 PM, Polytropon <freebsd at> wrote:

> I could imagine that somehow, when the OS and the GUI is loaded,
> the keys designed to adjust brightness emit a "normal" key code
> that the GUI (here: X's keyboard input machanism) picks up and
> does something stupid with it. You can easily check for that
> possibility: install the "xev" (X event viewer) port and press
> those keys. Look for "KeyPress" entries. What happens?

My "decrease brightness" key is Fn+F(4) where "Fn" is a separate key.
When I press the combination to decrease the brightness i.e. Fn+F(4)
on terminal xev produces an infinitely long output which I abort by
pressing the "Esc" key.

Here are some of the sample entries from the sequence:

Avinash Sonawane (RootKea)
PICT, Pune

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