[ltp] T480s, battery state jumping from fully-charged to charging while plugged in, battery LED doesn't change

[Rubin Abdi]

If I'm being too noisy in the void please let me know.

So I followed Kevin Locke's instructions on attempting battery calibration
on 5.18:

if charge thresholds are being used, clear them during recalibration:
>     echo 0 >/sys/class/power_supply/BAT0/charge_control_start_threshold
>     echo 100 >/sys/class/power_supply/BAT0/charge_control_end_threshold
> echo force-discharge >/sys/class/power_supply/BAT0/charge_behaviour
> # Wait until battery is fully discharged
> # Wait until battery is fully recharged
> # Restore change thresholds as desired


While monitoring upower -i, my machine sat at 0 Wh for about 10 minutes
before it switched to a pending-charge state (USB PD was still plugged in).
I think it sat in that state for a while longer before it switched to auto
and began recharge. I've allowed it to recharge, and once it got up to
"full" it started to flip again between fully-charged/charging every 2-5
seconds (and tossing up notification) while still displaying a white LED
next to the charging port for fully charged. Here are two samples from
upower:

    state:               fully-charged
    warning-level:       none
    energy:              51.31 Wh
    energy-empty:        0 Wh
    energy-full:         53.09 Wh
    energy-full-design:  57 Wh
    energy-rate:         3.085 W
    voltage:             12.988 V
    charge-cycles:       14
    percentage:          96%
    capacity:            93.1404%

    state:               charging
    warning-level:       none
    energy:              51.32 Wh
    energy-empty:        0 Wh
    energy-full:         53.09 Wh
    energy-full-design:  57 Wh
    energy-rate:         3.769 W
    voltage:             12.909 V
    charge-cycles:       14
    time to full:        28.2 minutes
    percentage:          96%
    capacity:            93.1404%

I dumped "96" into
/sys/class/power_supply/BAT0/charge_control_end_threshold and it's stopped
flipping. But I thought this would tune 0%-96% to scale what my battery
meter would display with 0%-100%, and not just stop charging at 96%
displayed on the meter.

So I guess my question is, am I doing this correctly, or is the root of my
issue elsewhere? If I hadn't already e-wasted the old battery I would pop
that in for a test.

Thanks.

On Tue, 14 Jun 2022 at 12:00, Rubin Abdi <rubin at starset.net> wrote:

> This issue has sadly returned. I would appreciate any recommendations.
> Thanks.
>
> On Mon, 13 Jun 2022 at 14:06, Rubin Abdi <rubin at starset.net> wrote:
>
>> I finagled an upgrade to 5.18.0 and things seem to be working fine now.
>> I'm not exactly sure why linux-image-amd64 got stuck at 5.16 during
>> upgrade, but an apt-get install worked. Thanks for reading.
>>
>> On Mon, 13 Jun 2022 at 12:55, Rubin Abdi <rubin at starset.net> wrote:
>>
>>> Hello.
>>>
>>> I'm running Debian Sid 5.16.0-4-amd64 from the repo. I just did a long
>>> needed aptitude safe-upgrade (I don't believe my kernel got upgraded).
>>> After reboot I am seeing upower -i
>>> /org/freedesktop/UPower/devices/battery_BAT0 report the state of the
>>> battery going from fully-charged to charging every few seconds (which is
>>> throwing up notifications in KDE every few seconds). The charging indicator
>>> LED on the machine is maintaining white for fully charged (yes I know this
>>> is subjective). Battery percent is maintained at 99%.
>>>
>>> Additionally about a month ago I replaced the battery in this machine to
>>> a new generic one off of Amazon, after install and discharge/recharging the
>>> thing a couple of times upower reported about a 94% battery capacity (which
>>> I feel like is typical of generic replacement batteries). Today it's at
>>> 93.1404%.
>>>
>>> I looked through the "Battery recalibration" thread from April, I could
>>> have sworn linux these days (along with the bios) manage recalibration on
>>> their own, but I suppose I'm mistaken.
>>>
>>> So at this point I don't know if the issue is something got tweaked on
>>> this last apt upgrade, or a recalibration needs to happen. Any advice would
>>> be appreciated.
>>>
>>> Thanks.
>>>
>>> --
>>> Rubin (he/him <https://pronoun.is/he/him>)
>>> rubin at starset.net
>>>
>>
>>
>> --
>> Rubin (he/him <https://pronoun.is/he/him>)
>> rubin at starset.net
>>
>
>
> --
> Rubin (he/him <https://pronoun.is/he/him>)
> rubin at starset.net
>


-- 
Rubin (he/him <https://pronoun.is/he/him>)
rubin at starset.net
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