[FS#735] LEDE 17.01.1 boot loop on Asus RT-N56U ramips, rt3883

[LEDE Bugs]

The following task has a new comment added:

FS#735 - LEDE 17.01.1 boot loop on Asus RT-N56U ramips, rt3883
User who did this - Timo Valtoaho (tinde)

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Hi

I made some testing yesterday. Flashed latest Asus' official firmware in, then tried with different lede firmwares. Results were so, that neither rt-n56u-squashfs-factory.bin nor rt-n56u-squashfs-sysupgrade.bin v17.01.1 was booting up. Also, older v17.01.0 rt-n56u-squashfs-factory.bin never booted up. Only way to recover is to use Asus' firmware restoration utility for flashing v.17.01.0 sysupgrade version.

Also tried builds from Image generator, same results.

One thing to note, I never managed to get in to a failsafe mode. Well, router itself was in failsafe mode according to PWR led flashing cycle, but no SSH or telnet connections could be established. Guides used in this phase:

https://lede-project.org/docs/user-guide/failsafe_and_factory_reset
https://wiki.openwrt.org/doc/howto/generic.failsafe

Leds were acting pretty much like it was described in the latter.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=735#comment2513