[Bug 2139097] Re: piboot-try netboot looks for tryboot on tftp share and boot loops

[Rich Theobald]

Yes, it was indeed the first thing I checked:

```
/tmp/mnt/sda/rpi5boot# cat autoboot.txt 
[all]
tryboot_a_b=1
```

I thought that was correct but do let me know if I'm missing something.

Thank you for your work on this, the new structure in the boot
partition/directory is much more elegant and easier to work with - even
with these minor teething issues.

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https://bugs.launchpad.net/bugs/2139097

Title:
  piboot-try netboot looks for tryboot on tftp share and boot loops

Status in flash-kernel package in Ubuntu:
  New

Bug description:
  Ubuntu 25.10 (GNU/Linux 6.17.0-1006-raspi aarch64)

  When the system netboots and there is a new firmware to test from an
  initrd.img update, the flash-kernel fails with error 'TFTP 1: file
  /tmp/mnt/sda/rpi5boot/tryboot.txt not found for 192.168.0.1' and moves
  to the next boot choice. If netboot is chosen manually from a boot
  menu, it just loops.

  The system has not created a tryboot.txt file in that folder. I notice
  that it also does not check a subdirectory based on the MAC address
  for a config.txt file as opposed to a normal boot.

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