[Sugar-devel] automatic backlight control
pgf at laptop.org
Mon Nov 21 12:06:12 EST 2011
> On 21.11.2011, at 15:22, Paul Fox wrote:
> > it quickly became clear (to me, at least) that it would be confusing
> > if user-dimming behaved differently than auto-backlight-control, with
> > respect to monochrome mode. whether or not it's confusing to the
> > user, it's definitely confusing to the code, since it's difficult to
> > always do the right thing if the user and the sensor are both changing
> > the brightness at the same time. so i disabled the switch to
> > monochrome entirely -- using the brightness keys doesn't change the
> > color/mono setting.
> IMHO (and not having tried it yet) the current behavior (switching
> to mono when manually reducing brightness) is fine, and the best
> compromise we found so far.
have we actually tried anything else? the coupling of monochrome to
brightness has been this way forever, as far as i know.
honestly, i'm surprised people consider this coupling to be so
important. given how subtle the difference between color and mono
modes with the backlight off, i really doubt most users would even
notice the change.
> When you add the auto-turnoff, it should only toggle the backlight,
> not the mono-color setting. I don't think that would be too
> confusing, from a user's POV it just means when it's bright
> outside, the backlight's power gets cut.
> I can see how it would lead to confusion if you map this desired
> behavior onto the existing olpc-brightness command. What's needed
> I think is an additional "override" independent of the brightness
> setting that just turns the backlight off. Everything else would
> stay the same.
it's not that easy. unless neither brightness mechanism messes with
the mono setting, then they need to be coupled somehow. otherwise
if the backlight is auto-offed (still color), then the user uses the
"dim" key (no brightness change, but now mono), and then the backlight
auto-ons, it will now be in mono. there's perhaps a way around that,
but you can see that it gets tricky to cover all cases.
do you also object to the new color/mono toggle, via the control
key (or via the UI)?
please try os12, when available, and see how it feels.
> - Bert -
paul fox, pgf at laptop.org
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