Tutorial  Updated

Fix for Linux Battery issue

Here's a quick and easy fix for the turning off at 40% battery issue that people are seeing after running Linux. This is effectively the same fix as unplugging the battery, but does so without having to take apart the Switch.

Step 1: Download attached fusee-linux-battery-fix.rar
Step 2: Extract and load the binary with your favorite RCM Smash tool (I'm using TegraRcmSmash).
Step 3: You should see the typical fusee screen, at this point unplug the USB cable. The screen should go off.
Step 4 (optional?): Hold the power button for 10 seconds. Your switch won't turn on at this point, that's desired.
Step 5: Plug in a USB cable. Switch will turn on, and you're done.

This worked to fix my Switch, let me know if it works for you.

Edit:

Source is here:

github/crystalseedgba/BatteryFix/blob/master/fusee/src/main.c (Sorry it's not letting me post hyperlinks)

This doesn't fix the Linux bug, this is really just a crude workaround. At first I suspected that Linux is somehow mangling the battery gauge but this doesn't seem to be the case. The battery gauge reports around 40% and decent battery voltage when my Switch would turn off. I think Linux is misconfiguring some undervoltage lockout somewhere, but I don't know where.

Thanks to jjbredesen for his "How to make a custom Fusee payloads" tutorial.
 

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  • fusee-linux-battery-fix.rar
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Notex

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leonmagnus99 said:
must it be fully charged before sending this payload?
can i use the tx menu to send a payload?

im hopeful for this to fix the slow charging thing as well. (had no power off on lower %)
Click to expand...
No I did mine at 97% charge and it's worked fine. And I assume it'll work with the TX menu.
 
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leonmagnus99

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Notex said:
No I did mine at 97% charge and it's worked fine. And I assume it'll work with the TX menu.
Click to expand...
cool, its no biggie.
i could just power it off, i have autorcm enabled.

and in the autorcm mode i only need to send payload.
but then what exactly would happen?

will something pop up ? some ui ?
if not , then can i proceed to sending the tx payload to boot into cfw.
 
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leonmagnus99 said:
cool, its no biggie.
i could just power it off, i have autorcm enabled.

and in the autorcm mode i only need to send payload.
but then what exactly would happen?

will something pop up ? some ui ?
if not , then can i proceed to sending the tx payload to boot into cfw.
Click to expand...
I'd definitely disable autoRCM before running this. Not an expert on the matter but autoRCM is known to do some weird things to the battery/charging.
 
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leonmagnus99

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xXxSwagnemitexXx said:
it tells you to unplug the USB cable
Click to expand...
gotcha, so when im sending payload it will tell to unplug and thats it?
will it reboot into ofw or something after ?

SomeGamer said:
I'd definitely disable autoRCM before running this. Not an expert on the matter but autoRCM is known to do some weird things to the battery/charging.
Click to expand...
darn it, im too lazy to keep sticking foil in it.
is it rly a bad idea running this payload from autorcm? ._.
 
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xXxSwagnemitexXx

xXxSwagnemitexXx

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leonmagnus99 said:
gotcha, so when im sending payload it will tell to unplug and thats it?
will it reboot into ofw or something after ?
Click to expand...
once you unplug the USB the screen goes black, you hold the power button for 10 - 15 seconds (nothing will happen, which is good). You then plug the USB back in and it should boot to OFW

I did this without AutoRCM tho, so if you have that then it may be different
 
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xXxSwagnemitexXx said:
once you unplug the USB the screen goes black, you hold the power button for 10 - 15 seconds (nothing will happen, which is good). You then plug the USB back in and it should boot to OFW

I did this without AutoRCM tho, so if you have that then it may be different
Click to expand...
better to be safe, so jamming foil in again it is then..
hmm, i'll see how it goes.

as long as this solves battery issues then cool, but what about having autorcm enabled again after doing this ? :l
is autorcm the reason for these battery issues or tx os cfw ?

if its tx cfw, then is there a chance of the bug returning after booting back into tx cfw x.x?
 
xXxSwagnemitexXx

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leonmagnus99 said:
better to be safe, so jamming foil in again it is then..
hmm, i'll see how it goes.

as long as this solves battery issues then cool, but what about having autorcm enabled again after doing this ? :l
is autorcm the reason for these battery issues or tx os cfw ?

if its tx cfw, then is there a chance of the bug returning after booting back into tx cfw x.x?
Click to expand...
the bug is caused by running linux/shofel2 or from a bug in firmware 3.0.0 (i think its 3.0.0, i dont remember exactly though)
 
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Playing Zelda at 34% and it doesn't turns off, this seems to work. THANK YOU!!!

Enviado desde mi SM-G930F mediante Tapatalk
 
BlastedGuy9905

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Crystalseed said:
Here's a quick and easy fix for the turning off at 40% battery issue that people are seeing after running Linux. This is effectively the same fix as unplugging the battery, but does so without having to take apart the Switch.

Step 1: Download attached fusee-linux-battery-fix.rar
Step 2: Extract and load the binary with your favorite RCM Smash tool (I'm using TegraRcmSmash).
Step 3: You should see the typical fusee screen, at this point unplug the USB cable. The screen should go off.
Step 4 (optional?): Hold the power button for 10 seconds. Your switch won't turn on at this point, that's desired.
Step 5: Plug in a USB cable. Switch will turn on, and you're done.

This worked to fix my Switch, let me know if it works for you.
Click to expand...
I did this. Now, I'm going to use my Switch in handheld mode for a good few hours. If this works... I will be left speechless.
 
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