Re: display autoadjust and blank screen

[Yves-Alexis P. <co...@co...>]

On Wed, 2006-02-22 at 21:39 +0100, Matthias Grimm wrote:
> On Wed, 22 Feb 2006 09:38:43 +0100
> Yves-Alexis Perez <co...@co...> wrote:
>=20
> > Hi there,
> >=20
> > i'd like to know if it's a bug (or a feature) that I can't blank the
> > screen with pbbuttonsd when using Display Autoadjust=3Dyes.
> >=20
> > If it's off, I can set the brightness from 15 to 0. If it's on, I can't
> > go below 1. I've reported this as a bug in debian bts [1] but no news.
>=20
> I'm sorry to hear that but debian bts is for debian only. I don't read
> the debian bugtracker on a regular basis.

Well, the maitainer could be overbooked :)
>=20
> Back to your question. It is not a bug. The responsible code is in
> module_display, function display_keyboard(), first part of the
> switch(changed){} statement, line 315-316.
>=20
> When automatic mode is active, the brightness keys generate an offset
> that will be added to the value from the automatic brightness
> controller. This offset will be clipped if the overall brightness
> level is out of range. The limits are 1 or BRIGHTNESS_MAX.

ok

>=20
> You might change the lower limit to 0 to be able to switch off your
> display completely also in automatic mode. But keep in mind that this
> value still depends on the ambient light level. That means if the
> environment goes darker, the backlight might be switched on again.

hmh, ok, but that won't do the trick :/

>=20
> I haven't got much feedback on this feature if the behaviour is ok
> or not. Nobody complained so far but that means nearly nothing. If you
> have a certain vision on how the behaviour should be, please tell me.
> Possibly it is a general benefit for the function.

I don't know the real behavior in OSX, but when using automatic adjust
you play on offset as well I guess. The difference is, when you switch
off the screen, setting brightness=3D0, it keeps this value even if light
goes darker.

I guess brightness=3D0 could be "forced", whatever the autoadjust switch
state is.
>=20
>   Best Regards
>     Matthias

Thanks for the reply :)

Regards,
--=20
Yves-Alexis Perez