[Sugar-devel] automatic backlight control

[Paul Fox]

bert wrote:
 > 
 > On 24.11.2011, at 16:09, Paul Fox wrote:
 > 
 > > bert wrote:
 > >> Today is a sunny day in cold Germany, unlike in the first half of the week. 
 > So 
 > >> I took the 1.75 outside.
 > >> 
 > >> IMHO the auto-off is fine as implemented in os12. Not distracting at all. 
 > >> Someone suggested turning it back on quicker, I tried that (replaced 
 > >> brightness_ramp with set_brightness), but that was much less nice.
 > >> 
 > >> As I said previously I like the new mono toggle using the brightness keys 
 > with 
 > >> ctrl.
 > >> 
 > >> But I also like the switch to mono when turning the brightness down 
 > manually. 
 > >> Much more convenient (and way more discoverable) than having to remember the 
 > >> ctrl-modifier. So I added those two lines back just as they were before, and 
 > it 
 > >> works fine. I would find it a foolish consistency to drop this just because 
 > >> automatic switch-off doesn't do it.
 > > 
 > > okay, sold.  
 > > 
 > > i did have a very brief chance to play with the laptop in the sun two
 > > days ago, and after trying more varied types of content, i better
 > > appreciate the value of mono mode.  it's sunny here today, so i hope
 > > to get to play with it some more myself.
 > > 
 > > i've implemented what a couple of people suggested for brightness key
 > > behavior:
 > 
 > (haven't seen that yet in your git repo)

not pushed yet.

 > 
 > >  - reducing brightness manually to level 0 remains colored (unlike
 > >    past releases, where level 0 also implied mono).
 > > 
 > >  - hitting "brightness down" one more time when at level 0 will
 > >    switch to mono.  users that use auto-repeat to get there probably
 > >    won't see a difference.
 > 
 > Not needed, see below.
 > 
 > >  - alt-brightness-down goes to level-0 in mono mode, as it always did.
 > >    i think it's a coin-toss whether it should go to level-0 in mono or
 > >    level-0 in color.  (thoughts?)
 > 
 > Mono.

good.

 > 
 > >  - "brightness up" from level 0 (whether from the color or mono
 > >    version of level 0) will always go to level 1, and restore color.
 > > 
 > >  - sunlight-driven auto-turnoff will go all the way to 0, but won't
 > >    invoke mono mode.
 > > 
 > > bert, i think you approved of the idea of this scheme on irc, please let
 > > me know if you still think so.
 > > 
 > > paul
 > 
 > 
 > I now think having two zero-brightness settings (crisp / blurred)
 > does not make sense for general usage.  +1 to what Gary wrote in
 > his followup.
 > 
 > For those who want to play with that we have ctrl-brightness-down/up to toggle 
 > blurryness ;)
 > 
 > So I would rather not add that extra step "below 0". 

okay, i'm fine with that -- i was on the fence.  but i think you and
gary are saying two slightly different things.

you're saying that the manual keypresses shouldn't have an intermediate
"level 0 in color" step.   gary's saying that auto-turnoff should go
to level 0 in mono.  i'm happy to agree with you.  i don't think i'm
ready to agree with gary.

reason for not agreeing with gary:  the switch from color to mono and
back is very noticeable when you're in bright sunlight.  the
auto-turnoff should be designed to be as transparent to the user as
possible.  there will be times when the auto-turnoff won't do quite
the right thing -- perhaps your hands are shading the sensor
momentarily, or perhaps your laptop was sleeping when you came
outside, and the auto-turnoff won't take effect until your first
keystroke wakes it up.  in those cases i think the auto-turnoff should
stay in color mode.

paul

 > 
 > - Bert -
 > 
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=---------------------
 paul fox, pgf at laptop.org