Hacking Do we know if sx os will have a solution to battery desync

[abdul85pl]

Can we not resync battery by charging it to 100% in Horizon then going to RCM and charging it there to 100% as well.?

There is no charging in RCM so yes...

 

[z10m]

There is no charging in RCM so yes...

RCM charges battery just fine. Tested by me and many others.

Well maybe not RCM on its own but when payload is loaded.

 

[abdul85pl]

RCM charges battery just fine. Tested by me and many others.

Nope. Let me reach home and my pc i will qote u sth - hard to search on cell while driving even in traffic.

Edit: i was wrong. Sorry.

 

[riyyi]

being in RCM drains battery but doesnt charge when connected

There is no charging in RCM so yes...

Nope.

This is incorrect, it charges fine.
I tested this with an USB power meter, see images below:

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Console turned on:

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Console booted payload:

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Console in RCM mode:

 

[z10m]

My battery just got desynced and switch shuts down at 49%. I will charge it to 100% in horizon then will leave it charging in RCM and report back if it fixes it.

 

[Keksus]

My battery just got desynced and switch shuts down at 49%. I will charge it to 100% in horizon then will leave it charging in RCM and report back if it fixes it.

Yeah please Report it

 

[abdul85pl]

This is incorrect, it charges fine.
I tested this with an USB power meter, see images below:

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Console turned on:

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Console booted payload:

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Console in RCM mode:

Ok. I was wrong sorry.

 

[Swan1360]

Well my battery desynced as soon as I tried running Linux. Not even more then 5 mins of use my switch was turning off at %20, so I’m thinking it’s instant I was also at %100 and still connected to a power source when trying.

 

[Hodorian]

The desync is an bug/feature from horizon.

Horizon saves the values of the Battery. Starting horizon after using the battery without horizon, leads to the bug. since horizon uses the saved battery Informations and not the real one.

So every battery usage outside horizon lead to an desync. If the rcm mode doesn't update the battery stats it can also cause an desync.

Someone should write an homebrew app for a battery resync.

 

[Keksus]

My battery just got desynced and switch shuts down at 49%. I will charge it to 100% in horizon then will leave it charging in RCM and report back if it fixes it.

And work it or not ?

 

[Jungle_Jon]

This is incorrect, it charges fine.
I tested this with an USB power meter, see images below:

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Console turned on:

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Console booted payload:

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Console in RCM mode:

So based on your testing, charging the Switch in HOS to 100% and then charging it again in the RCM / once a payload has been sent should resync. I would leave for hours in both to be 100% sure, it's sync'd back

 

[Mach]

A lot of people has too many stripped screws on the backplate of switch. and are unable to open it. guess someone has to update thay 3.0.0 pegaswitch battery desync script

 

[z10m]

And work it or not ?

Nope didn’t work. Ended up unplugging the battery.

 

[shinrukus]

Then in Theory, could you charge your switch to 100 in Horizon/OFW, power off, then boot Linux and charge to 100, power off, and they be in sync?

 

[Shadow LAG]

As the title says I was wondering if we have any knowledge if it’s something that can be fixed. Mainly because I’m curious if it’s worth taking my switch apart repeatedly to fix the issue. Also I haven’t seen this anywhere so sorry if it’s been asked

No it wont fix it

Bullshit, it definitely will because we fixed over 12+ members recommending the cold boot method.

ALSO THERE ARE ALREADY 7+ THREADS ABOUT THIS, PLEASE GO TO THE OG THREAD FOR ALL INFORMATION. NO THERE IS CURRENTLY NOT A WAY TO FIX THE DESYNC WITHOUT PULLING BATTERY:

https://gbatemp.net/threads/battery-problem-after.502213/page-6

 

[TamarindoJuice]

Ok. I was wrong sorry.

So it charges in RCM mode? If i have AutoRCM enabled and my switch run out of juice fully, i don't need to open it to recharge the battery and get out of the trouble of not powering on neither recharging?

 

[Shadow LAG]

I can confirm RCM mode will charge your battery as I sat in a hekate payload with USB-C connected to PC and when I came back with more battery percentage than previous. Even if for some reason your switch completely dies and will not charge battery, the passthrough power from the USB-C should be enough to allow you to boot into SX OS / Stock Horizon

 

[Draxzelex]

Full details on the Switch's charge rates in RCM, with and without AutoRCM

So, Switch charges and does not charges in RCM. xD

The results (battery was 89%):


The switch can charge normally the battery, if the BCT is intact!
In RCM AND in hekate menu.
*BCT is the boot configuration table that autoRCM corrupts.

Tests showed that it was charging with the same current, as in Horison OS.
The current it was drawing with 89% battery, was 800mA - 1000mA, using Switch wall adapter. On PC, it was the max the hub could give.


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The switch cannot charge normally with a corrupt BCT (AutoRCM).
In hekate, it shows similar behavior (read below).
Extra emphasis on the "normally".

With autoRCM, basically a corrupt BCT, the switch behaves differently.
There are 2 behaviors that I saw when connecting to the switch wall charger:

• Common - It was draining 140-250mA.
• Common (in hekate) - 200mA - 400mA
  
• Rare (normally if you connect charger after powering off from HOS) - Drain of alternating 250mA and 1000mA, with surges of 2.5A.

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Summary - facts:

1. Switch can charge completely normally in RCM or Hekate with a BCT intact
   • The percent % in Horizon OS, after a RCM charge, is not fake.
2. Switch does not charge normally with AutoRCM, a.k.a corrupt BCT.
   1. Either it charges very slowly or sometimes with a broken slow/fast/slow/fast charge pattern:
   2. Or this behavior is current taken from the USB controller or the BPMP (Nvidia's Boot and Power management processor)
   • In AutoRCM, the Charge IC probably can't update the battery calibration file and could make the percent fake.

I don't know for behavior .3 what really happens and what Switch does. This can be easily examined, by connecting a current multimeter between battery and switch and check the readings.