> [email protected] wrote: > > Thanks Paul > > thanks for testing! > > > > > The logic appears to be buggy, see #11487: XO-1.75 OS12 backlight > > is off when you come back inside > > okay, more testing is needed. as you noted, it's quite hard to tell > when it's on and off. i'll see if i can come up with an indicator, > on the display or on the LEDs, which will help during debug.
Its not too hard to write a TurtleArt program which continuously prints the brightness sensor and the screen brightness, there is a block for the brightness sensor and sample python code 'sensor.py' for the screen bightness > > > > > As it stands, neither the monochrome nor colour modes are OK in > > full sunlight. The colour mode causes a significant loss of > > resolution for reading small black text and even more resolution > > loss with coloured text. > > to clarify -- neither of these issues is caused by the auto-turnoff, > but they might suggest that one or the other modes is a better target > in full sun -- is that what you're saying? The loss of resolution in full sunlight results from disabling the monochrome mode, disabled for both manual and automatic triggering in OS12 > > where can i find some colored text on the laptop? I am not sure what you are asking, links in webpages is one example, you can create coloured text in Write > > > > > With the monochrome mode, the shadow of your hands as you type is > > enough to switch mode which is quite distracting > > the color/mono selection shouldn't have affect on how much light > causes the mode switch. no it doesn't, what are you saying? > > > > > The cutin cutout settings are 50 (bright)and 80 (dark). It does > > not seem worth raising the 80 figure because there is still visible > > colour information at 70. The 50 figure could be lowered, direct > > sunlight is 5-10, so I tried 15, this still could give mode > > switching from your hands' shadow in direct sunlight. > > how can you tell the switch has occurred, if you're in full sunlight? > i honestly can't tell when it's happened. I am running a Turtleart program to interrogate the sensor and screen brightness > > > > > What I suggest is that the backlight not switch off unless you have > > been in the sun for (eg) 5 minutes, but switch back on immediately > > in the dark. I don't have the coding skills or I would have tried > > it out. > > > > For anybody who wants to try it powerd is at /usr/sbin/power > > > > the brightness settings are at line1853 monochrome is commented out > > at lines 1764 &1793 > > > > uncommenting these lines reenables monochrome in response to the > > sensor but surprisingly not the control keys > > i don't follow -- the code in powerd currently has (or should have) no > effect on how the brightness keys work. they're handled by > olpc-brightness. so they should continue doing what they were doing > before you modified those lines to reenable "zero brightness gives mono" > behavior. The brightness keys no longer give monochrome at zero brightness. You must have coded that somewhere in powerd? Line 1793 looked like it was going to be the culprit. > > paul > > > > > Tony > > > > > [email protected] wrote: > > > > The shift from colour to monochrome is noticable and would be > annoying if > > it > > > > happened a lot, for example as clouds pass, trees and people move. > > > > > > > > If the hysterisis, the difference between cutin and cutout brightness > is > > large, > > > > the change in mode will happen a lot less frequently and not be > annoying. > > > > > > > > I would like to try it switching automatically to monochrome but with > > large > > > > hysterisis. > > > > > > > > I'll wait to try OS12 > > > > > > > > > you may be in a better position to play with this, geographically > > > speaking, than i am -- we're running low on sunlight these days. > > > > > > the hysteresis is currently hard-coded in powerd -- you'll find it in > > > the function ambient_adjust_init(). it only gets set once, though, so > > > after powerd starts, you can change the limits directly and they > > > should take effect immediately. > > > > > > additionally, to cause auto-monochrome to happen, uncomment the > > > obvious lines at the end of set_brightness() and brightness_ramp(). > > > > > > paul > > > > > > > > > > > Tony > > > > _______________________________________________ > > > > Devel mailing list > > > > [email protected] > > > > http://lists.laptop.org/listinfo/devel > > > > > > =--------------------- > > > paul fox, [email protected] > > > _______________________________________________ > > > Sugar-devel mailing list > > > [email protected] > > > http://lists.sugarlabs.org/listinfo/sugar-devel > > > > > > _____________________________________________________ > > > This mail has been virus scanned by Australia On Line > > > see http://www.australiaonline.net.au/mailscanning > > =--------------------- > paul fox, [email protected] > _______________________________________________ > Sugar-devel mailing list > [email protected] > http://lists.sugarlabs.org/listinfo/sugar-devel > > _____________________________________________________ > This mail has been virus scanned by Australia On Line > see http://www.australiaonline.net.au/mailscanning _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
