Hacking Sleep mode crash after downgrade from 6.1 OFW to 5.1 CFW with NAND backup?

pingtendo · Nov 20, 2018

It's for my friend, who doesn't speak English very well...

He was on 5.1 (fuse count = 6) but accidentally updated to 6.1 (fuse count = 7) couple days ago.

He has 5.1 NAND backup, and uses ChoiDujour to downgrade to 5.1 cfw already. However after the downgrade, his console will crash as soon as entering into sleep mode, and he needs to inject the payload to be able to boot again.

Is there any way to fix the sleep mode crash issue on at all? (I know 6.2 to 6.1 seems impossible at the moment, but how about 6.1 to 5.1)

Thank you for your help!

ZachyCatGames · Nov 20, 2018

Warmboot fuse check, and no there isn’t a way to fix it unfortunately

Shift-X · Nov 20, 2018

pingtendo said:
It's for my friend, who doesn't speak English very well...

He was on 5.1 (fuse count = 6) but accidentally updated to 6.1 (fuse count = 7) couple days ago.

He has 5.1 NAND backup, and uses ChoiDujour to downgrade to 5.1 cfw already. However after the downgrade, his console will crash as soon as entering into sleep mode, and he needs to inject the payload to be able to boot again.

Is there any way to fix the sleep mode crash issue on at all? (I know 6.2 to 6.1 seems impossible at the moment, but how about 6.1 to 5.1)

Thank you for your help!

You're safe on 6.1. Do a NAND backup and delete Wi-Fi settings so you don't make the same mistake again. I personally use 90DNS so I can go online without connection to Nintendo Servers (USE AT YOUR OWN RISK... Nintendo is unpredictable). Do not update to 6.2

pingtendo · Nov 21, 2018

My friend says "thank you all for your replies and suggestions".

natedog102 · Nov 21, 2018

pingtendo said:
My friend says "thank you all for your replies and suggestions".

Wholesome as fuck

jsherm101 · Nov 21, 2018

to add more context - when you update via normal nintendo update (aka without using choidujour) you will burn fuses for whatever number of fuses that version has (some updates, like 6.0.0 to 6.0.1 have the same fuse count)

When you use Choidujour you're forcing autoRCM after the update which prevents the fuses from being checked/burned for that version. That's what allows you to upgrade/downgrade without the sleep crash because your fuse count still thinks you're on the previous version -- since you've burned those fuses your switch now thinks it's on 6.1.0 -

in the future always update using choidujour to prevent this, but keep in mind you'll have to live with autorcm

the sleep/warm boot crash is because the fuses check themselves at that point, notice a mismatch, and shut down your device, so you can "downgrade" but your switch will always crash once it does a fuse check so you can't let it sleep

guaycuru · Nov 22, 2018

jsherm101 said:
the sleep/warm boot crash is because the fuses check themselves at that point, notice a mismatch, and shut down your device, so you can "downgrade" but your switch will always crash once it does a fuse check so you can't let it sleep

I'm sorry if this has been answered before, but does it mean that a downgrade with AutoRCM enabled AND booted via Hekate (obviously) also crashes when going into sleep mode? Or does Hekate's fuse checking / burning prevention prevent that sleep crash?

PiracyForTheMasses · Nov 22, 2018

Why doesn't your friend just stick with 6.1 instead of wanting to downgrade to 5.1. Just dont update to 6.2

tikanot · Nov 22, 2018

6.2 resolve sleep mode? because it s hard for my children to use it. for cancel update i have format my sd card and switch To delete all and now no wifi

jsherm101 · Nov 23, 2018

guaycuru said:
I'm sorry if this has been answered before, but does it mean that a downgrade with AutoRCM enabled AND booted via Hekate (obviously) also crashes when going into sleep mode? Or does Hekate's fuse checking / burning prevention prevent that sleep crash?

I don't believe so. Choidujour is skipping the step where fuses get burned when it installs an update and keeps AutoRCM on in order to preserve this later, so if you install via official Nintendo update, you've burned the fuse and will have the downgrade issues previously described

tikanot said:
6.2 resolve sleep mode? because it s hard for my children to use it. for cancel update i have format my sd card and switch To delete all and now no wifi

do not update to 6.2 at this time

tikanot · Nov 23, 2018

i know but my child i have update it and now i have 8fuse burn and i have downgrade to 6.1

Aniblaze · Nov 23, 2018

tikanot said:
i know but my child i have update it and now i have 8fuse burn and i have downgrade to 6.1

I'm imagining the pope softmodding his console right now.

tikanot · Nov 23, 2018

the switch is very hard to use for kid.I have say at my son to ask me when he see something but he have 4years

BlackTSQ · Nov 23, 2018

tikanot said:
the switch is very hard to use for kid.I have say at my son to ask me when he see something but he have 4years

Thats a long sentence for a child...

Jk

So if i understand it correctly, you accidentally updated to 6.1, and then you downgraded to 5.1 with choidujourNX and now sleepmode isn't working anymore. If thats the case you can just update to 6.1 with choidujourNX again and it should work fine.

However, if you have been on 6.2 allready you are pretty much out of options. Until a custom firmware for 6.2 comes out you can either use it the way you are using it right now (with broken sleep mode), or use it on original firmware 6.2 and lose the benefits of custom firmware.

tikanot · Nov 23, 2018

child update To 6.2 i downgrade To 6.1 but lot of bug not only sleep mode hard To go in rcm and in boot switch power off and after computer reconized it at usb no descriptor.i must wait long time To computer reconized good. i have put autorcm in order no more fuse burn

Hacking Sleep mode crash after downgrade from 6.1 OFW to 5.1 CFW with NAND backup?

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