libera/#maemo-leste/ Saturday, 2021-09-18

SteveMGood morning, after 11 years I bought an another n900, got scammed as it was suppose to be fully working, only to find that the screen is kinda defective, I can calibrate the top scree 1 and 2 but no way I can calibrate the second bottom half 3 and 4, do you think I should replace the touch screen or a flash might save it...05:50
siceloSorry about that. You will have to replace the touch. Or, give up on N900 and get Droid 4 or pinephone08:37
tmlinduvos: is plain v5.15-rc1 booting for you with battery connected? i can boot my test device with no battery, but my phone fails to boot..09:32
tmlindalso my flakey pl2303 debug port is acting up, so not seeing phone debug output right now..09:33
tmlindoh well need to continue debugging later09:35
sixwheeledbeastdigitiser more than screen10:07
sixwheeledbeastflash is always worth it10:08
WizzupI tried to replace a digitiser but it was quite hard :)12:31
sixwheeledbeastpossibly the digitizer flex/connector or main flex/connector? if you rule out the software your left with a hardware fault.12:35
uvostmlind: no i generaly dont try new kernel versions on d4 until i rebase my stuff off your branch as i treat you as my upstream16:27
uvostmlind: but if your having issues with your usb-ttl i can capture the output for you later16:27
uvosparazyd: what about acitvating charge-mode for mapphones?17:43
uvoswe should do this at some point..17:43
uvoscharge mode now also works fine on n90018:24
Wizzupneat18:24
uvosshould work fine on pp too anyhow18:25
uvosbut cant test obv18:25
lelIMbackK synchronize a pull request: https://github.com/maemo-leste/leste-config/pull/25 (add quirks-mapphone to mapphone mce config)18:28
lelIMbackK synchronize a pull request: https://github.com/maemo-leste/leste-config/pull/25 (add quirks-mapphone to mapphone mce config)18:29
lelIMbackK edited a pull request: https://github.com/maemo-leste/leste-config/pull/25 (Various leste-config changes)18:29
lelIMbackK edited a pull request: https://github.com/maemo-leste/leste-config/pull/25 (Various leste-config changes)18:30
uvos^^^ this is also needed for charge-mode on n90018:30
uvosand the cmdline change same as mapphones ofc18:31
lelIMbackK synchronize a pull request: https://github.com/maemo-leste/leste-config/pull/25 (Various leste-config changes)18:58
sicelouvos: critical voltage for N900 shall be below 3248mV, otherwise the device will never calibrate. iirc, 3198 is a good value.21:37
uvossicelo: upower/mce take very long to realise that the voltage has dropped so idk if 3.198 is early enough to have it make it21:47
uvossicelo: the same problem exits on mapphones too21:47
uvoswe maybe need some sort of callibration mode21:47
uvos3198 also seams like quite a random value21:48
uvoswhere is that comeing from?21:48
uvosreally 3.2 ish volts is bad if you keep it up21:50
uvoshttps://www.dnkpower.com/wp-content/uploads/2019/01/discharging-curve-lipo-battery.png21:50
uvossee the discarge curve of a lipo, there is no power below 3.321:51
uvoscycle life wise it drops off conciderably below 3.3v too21:51
sicelothe thing is - 3248 is burned into the EPROM of bq2720022:02
uvosyeah sure22:03
uvosbut why 3.198?22:03
uvosthat seams random22:03
sicelolol22:03
uvosis it x adc steps?22:03
siceloanyway, the voltage must be below 3248 for around 15s, iirc22:03
uvoslol?22:03
sicelo3198 is what nokia had in bme.22:05
sicelojust make it whatever you like really. but if it's higher than 3248, your users will not be able to calibrate their batteries.22:06
sicelothe Li-ion batteries in the Nokias seem to perform alright with these low voltages ... at least I don't recall issues about premature battery wear mentioned anywhere on tmo. i know Li-Po and Li-ion are similar in many ways though22:08
uvoswell li-po = li-ion22:10
uvoslipo is just a type of liion22:10
uvosanyhow yeah some solution is needed22:10
uvosill lower the voltage for now22:10
uvosbut i would be more comfortable with a 3.3v and a special charge mode maybe22:11
uvos the battery in n900 is lipo no?22:11
uvossure feals like one22:11
uvosbut have not dissasembled22:11
siceloit's Li-ion22:11

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