Hacking Switch 22.5.0 network crashes — blank serial / missing PRODINFO

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EmrgncyExt

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I’m troubleshooting a modded Switch on firmware 22.5.0 with Atmosphère 1.11.2. It is currently using CFW on sysMMC, not emuMMC.

The main issue is that any network activity causes a crash. The console can connect to the router, and at one point the internet test succeeded, but it immediately crashed afterward.

The recurring error is:

Error Code: 2123-0011
Program: 0100000000000025
Firmware: 22.5.0
Atmosphère: 1.11.2

This also happened when booting stock firmware from Hekate, so it does not seem to be caused by a normal Atmosphère sysmodule or homebrew app.

Things already tried:

  • Updated Atmosphère, Hekate, and fusee
  • Fixed mismatched fusee error
  • Replaced the Atmosphère folder with a fresh clean copy
  • Disabled atmosphere/contents
  • Disabled atmosphere/hosts
  • Removed override_config.ini while testing
  • Deleted/re-added Wi-Fi settings
  • Initialized the console
  • Let the Switch delete/rebuild the SD card’s Nintendo data
  • Tried blocking Nintendo with Atmosphère hosts
  • Tried 90DNS
  • Tested both Atmosphère sysMMC and stock firmware
Blocking Nintendo did not fix it. Opening Sphaira also triggered the same network crash, likely because it tried to access the internet.

I checked System Settings → System → Serial Information, and the serial number is blank.

My exosphere.ini has:

[exosphere]
blank_prodinfo_sysmmc=0
blank_prodinfo_emummc=1

So Exosphere should not be blanking sysMMC. That makes me think sysMMC PRODINFO was blanked directly at some point, possibly with Incognito or a similar tool.

The only PRODINFO-related file I found is:

atmosphere/automatic_backups/INVALID_PRODINFO_AF93F114.bin

I also found BISKEYS.bin and a Hekate backup folder with BOOT0/BOOT1, but restore/partitions is empty. I do not have a clean PRODINFO backup that I can find.

At this point, I’m trying to figure out if the blank/missing sysMMC PRODINFO is the cause of the network crashes, and whether there is any practical way to stabilize homebrew internet without an original PRODINFO backup.
 
Hmmm.... Well, this seems funny. Look at the shell. Did you tear a sticker off, was there a sticker (info, with serial number) in the first place? If so, i dont have a switch and i dont know what really for you to use. But, if theres a serial number there, you can use that if you create a new PRODINFO with that serial number with some tool i dont know...
 
Hmmm.... Well, this seems funny. Look at the shell. Did you tear a sticker off, was there a sticker (info, with serial number) in the first place? If so, i dont have a switch and i dont know what really for you to use. But, if theres a serial number there, you can use that if you create a new PRODINFO with that serial number with some tool i dont know...

His issue is that he blanked out his serial number but without properly blocking server communication, that why it crash.
 
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