[ltp] Debian Wheezy w/XFCE screen brightness step value

[Yves-Alexis Perez]

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On mar., 2012-02-21 at 12:45 -0200, Henrique de Moraes Holschuh wrote:
> > with some annoyance, that when I change the screen brightness with the
> > Fn-Home/End keys that occasionally a graphical brightness icon appears
> > and when it does, the screen is dimmed or brightened in multiple steps.
> > The T60 has eight brightness levels and when this icon appears it cuts
> > it to about 4 levels.
>=20
> This typically means broken crap that reacts to brightness *change* event=
s
> as if they were keypresses.  Thinkpad-acpi doesn't issue those events by
> default exactly for that reason, but some distros insist in breaking thin=
gs.
> IMMV.  I have no idea what exactly happens when ACPI video is active, but=
 it
> is likely that it can be subject to the same problem.  You can even get i=
t
> broken three times over, by forcing both thinkpad-acpi AND acpi-video to
> issue the events, and react to both events by messing with the display
> brightness.=20

Yeah the key events are reported by the kernel even though the
brightness keys are properly handled there. Before (when hal was there)
there was a property (something like
laptop_panel.brightness_in_hardware) exported to clients so they knew
they shouldn't touch the brightness. Now with upower that thing is gone.

That confuses xfpm, but there's a way to change that using a hidden
configuration option:

xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/change-brightne=
ss-on-key-events
false

(you can use xfconf-query or xfconf-editor to make the change).

When you do that, the brightness popups starts to be a bit confused so
you can disable it with the /xfce4-power-manager/show-brightness-popup
key.

More information can be found at
https://bugzilla.xfce.org/show_bug.cgi?id=3D7541

Regards,
--=20
Yves-Alexis

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