ismael wrote: > Hello everyone, I'm trying to perform some tests on XO battery life > performance and I have some questions which I couldn't find a clear answer > in the wiki or this list:
i'm sure richard will chime in, but here's a start. > > - When the battery level is "critically low" the OS (Sugar 0.88 based > Dextrose) performs a safe shutdown. I would like to know what is the exact > condition that triggers this. the answer to this depends on what version of powerd is running. in the latest powerd versions, we force a shutdown if the capacity is 1% (or less :-), or if the battery voltage is 5.7V or less. we don't bother with these checks unless the capacity is below 40% (which may be a pointless optimization). these checks were slightly different in powerd versions 27 and earlier, but i suspect dextrose is running something newer than that. > - Likewise, at some level controlled by the XO EC, the battery led light > begins to flash orange/red. I would also like to know which is the exact > condition that triggers this. Is it the SOC, battery voltage, ACR... ? And i believe this value is 5.7V. (i.e., battery voltage) > what level triggers this condition? I would also like to know the level in > which the XO performs a "hard" poweroff. 5.5V on XO-1.5, 5.4V on XO-1. also remember that the voltage at the battery will change, substantially, between the suspended and running states -- so what the EC sees during suspend may be several tenths of a volt higher during suspend than when the system is running. paul > > Any help is appreciated. > > Thanks! > > Regards, > Ismael > > -- > Ismael Schinca > Centro Ceibal - Depto. Técnico - I+D > Avda. Italia 6201 - Edificio Los Ceibos > Montevideo - Uruguay. > Tel.: 2601 57 73 Int. 2232 > part 2 text/plain 129 > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel =--------------------- paul fox, p...@laptop.org
_______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel