Homebrew Is Downgrading Permanantly Gone?

[sj33]

Yes, anything that uses svcBackdoor will break which apparently includes emulators with dynarec. But if you aren't already using the 10.2 firmware.bin with your cfw (which anyone using NTR already is) doing so apparently fixes it.

This is a big deal - it'll also break PCSX ReARMed then, as well as Picodrive's 32X and SVP support. I don't use NTR so I just have 10.4 native firm.

So, it's safe to update to 11.0 but we have to use outdated native firm?

 

[Jiro2]

Yes, anything that uses svcBackdoor will break which apparently includes emulators with dynarec. But if you aren't already using the 10.2 firmware.bin with your cfw (which anyone using NTR already is) doing so apparently fixes it.

If you can write a CFW you have complete control over the system. Would it be possible to have the CFW patch the system to allow an equivalent form of access to svcBackdoor?

 

[nl255]

This is a big deal - it'll also break PCSX ReARMed then, as well as Picodrive's 32X and SVP support. I don't use NTR so I just have 10.4 native firm.

So, it's safe to update to 11.0 but we have to use outdated native firm?

Yes. Since you are using luma just grab the 10.2 firmware.bin file and put it in sd:/luma/ . As for it being completely safe, that is not 100% certain as it is always possible that cfw detection/banning code has been added.

--------------------- MERGED ---------------------------

If you can write a CFW you have complete control over the system. Would it be possible to have the CFW patch the system to allow an equivalent form of access to svcBackdoor?

Yes, at least in theory. I don't know if any of the cfw devs are working on it yet since you can always just use the same 10.2 firmware.bin that is used to make NTR work.

 

[Billy Acuña]

Well, we still have NTRCardHax, but you need a proper DS flashcard to run it

 

[Lucar]

Plailect - Today at 8:22 PM
Apparently 11.0 did not patch mch2.1, just fucked around with am:u to break it temporarily
This is fixable

 

[CeeDee]

Plailect - Today at 8:22 PM
Apparently 11.0 did not patch mch2.1, just fucked around with am:u to break it temporarily
This is fixable

memchunkhax2.2? memchunkhax3&Knuckles?

 

[Lucar]

memchunkhax2.2? memchunkhax3&Knuckles?

memchunkhax4dsiDDN64BAES&Knuckles&Knackles&Chuckles&Wearyourseatbeltbuckles

 

[ihaveahax]

Well, we still have NTRCardHax, but you need a proper DS flashcard to run it

this was fixed in 10.4.

 

[Lucar]

-ignore-

 

[ViolentRockstar]

There will probably be a hardmod-downgrade soon. After that everything else will follow. Just wait and see, follow the dev's on their twitters for updates if you really wanna know .

 

[DjoeN]

So why all the fuss about not been able to downgrade anymore?
- If you are on 10.7 you still can downgrade!
- If you are on 9.2> you still can downgrade! (Upgrading to latest Firmware to downgrade is not really needed!)

And i'll tell it again:
- Make NAND backups before you upgrade! (Yes, sysNAND AND EmuNAND)
- And to be 100% safe, make a SD backup of your 3DS SD (Files backup or image or even both!)

If you updated to 11 before getting OTP or whatever you need to downgrade for, well nothing to say then, damned you where really stupid!

 

[sj33]

I had assumed that dynarec simply required kernel access, which would obviously be granted by whatever exploit you are using. It surprises me that we also relied on svcBackdoor within the firmware. I'd love to know the technical reason for this.

 

[CorBond57]

Got a source on that?

 

[Lucar]

Got a source on that?

If you don't believe me ask Plialect, he was the one that said it in the first place. He's usually on the /r/3dshacks discord chat, if you don't know where to find him.

 

[DinohScene]

You can downgrade with a hardmod from 11.0.
@StandardBus managed to do it already.

 

[The Real Jdbye]

I had assumed that dynarec simply required kernel access, which would obviously be granted by whatever exploit you are using. It surprises me that we also relied on svcBackdoor within the firmware. I'd love to know the technical reason for this.

Within an updated CFW emuNAND/sysNAND the kernel exploits are patched. Since svchax is also not working there's no way to get ARM11 access once booted into an updated NAND. Though svchax would hardly be ideal for running emulators anyway due to how unstable it is.
It would be possible to patch in a backdoor in FIRM to for example allow direct ARM9/ARM11 kernel access from within CFW without additional exploits. It's just that no one has done that yet.

 

[The Catboy]

I predict another hardmod related downgrade to follow this update. Why? Crystal powers.

Called it
https://www.reboot.ms/forum/threads/downgrade-3ds-11-0-to-9-2-using-hardmod.2403/#post-34280