How to stop phone from powering up when charging from 0%?

de0u

tac That being said, from my experience with other devices, when the battery was fully discharged and upon subsequent connection to charger, they'd technically power on but proceed to a special bootloader mode that would show a message saying "charge too low to power on," or something to that effect, and would then either remain in this state without further booting (with only the message disappearing) or proceed to boot automatically only once charged a bit more.

That absolutely could be done.

ronburgundy

I'm having the same issue with the Pixel 8. My current workaround is booting into fastboot mode once it runs out of battery in order for the phone to charge, otherwise it gets stuck in a rebooting cycle.

At present it seems that the power controller has a target power state (on or off), and that if power is exhausted when the OS is running (target power state: on) then when the machine restarts the target power state is still on. ... I don't think it would be straightforward for the firmware to predict how much power the OS might need to get past the early stages of booting.

@de0u

Would it be easier to estimate the expected amount of energy needed to power down than to estimate energy needed to get passed early stages of booting? If so, maybe it would be easier to programatically power off the device once it reaches some threshold.

de0u

ronburgundy Would it be easier to estimate the expected amount of energy needed to power down than to estimate energy needed to get passed early stages of booting?

A challenge here is that old batteries crash faster than young ones.

From the perspective of keeping the battery usable for the long term, charging it when it gets down to 20% is probably good, or 10% if it is infeasible to charge at 20%. If a battery is routinely crashing at 20% or even 10% it should probably be replaced.

DeletedUser433

de0u I thought this fixed the issue but apparently it didn't because it would start booting up again when I wasn't looking.

tac This seems like a sick joke, having it turn on just long enough for it to lose all charge and then turn off and on again endlessly

de0u

DeletedUser433 I thought this fixed the issue but apparently it didn't because it would start booting up again when I wasn't looking.

So far, tapping the power button to pause booting has appeared to work for everybody it has been suggested to.

Is it possible that your battery has failed, so that it can't charge?

If you watch it carefully for 30 minutes while it's paused, in which minute does it start booting by itself?

DeletedUser433

de0u I realised that I didn't respond. Pressing pause seems to fix the issue most/all of the time and I didn't bother to watch my phone closely so the errors probably came from me not pressing the button hard enough

So it's solved

de0u

short-lived This thread was marked "solved" because the original poster indicated that the workaround mentioned earlier in the thread (de0u de0u) worked. It was not marked "solved" as a way of claiming that the behavior of the firmware provided by Google is ideal. Have you tried the workaround mentioned earlier in the thread?

trashaccount

Its a firmware level "feature". The OS cant change it.

Hold volume down button when its plugged in and when it turns on with the bootloader screen select "Power off". You cant really mess up much on that sceen anyway.

de0u

DeletedUser433 Thanks for reporting back!

short-lived

This wonderful little feature just caused my phone to be in an inifite crash boot-loop, so yeah, clearly something that doesn't need addressing.

short-lived

de0u There is no workaround to solve my issue. The thread was about phones turning on once they start being charged. My issue is that the subsequent restarts corrupted my os.

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