[FS#3971] Zyxel nbg-419v2 bootloop

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Mon Aug 9 15:11:00 PDT 2021


A new Flyspray task has been opened.  Details are below. 

User who did this - diego0815 (diego0815) 

Attached to Project - OpenWrt/LEDE Project
Summary - Zyxel nbg-419v2 bootloop
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Critical
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - after upgrading my zyxel nbg-419v2 to 2021.02RC4 i noticed a bootloop

when connecting the serial cable it turned out to be a kernel unpacking issue:

raspi_read: from:50000 len:40 
.   Image Name:   MIPS OpenWrt Linux-5.4.137
   Created:      2021-07-31  17:21:01 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    1496161 Bytes =  1.4 MB
   Load Address: 80000000
   Entry Point:  80000000
raspi_read: from:50040 len:16d461 
.......................   Verifying Checksum ... OK
   Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover

U-Boot 1.1.3 (Jun  9 2012 - 07:23:11)

Board: Ralink APSoC DRAM:  64 MB
relocate_code Pointer at: 83fac000
Software System Reset Occurred
spi_wait_nsec: 3c 
spi device id: c2 20 17 c2 20 (2017c220)
find flash: MX25L6405D

once i managed flashing 19.07.08 via tftp it works again as expected.

unfortunately [[https://openwrt.org/toh/zyxel/nbg-419n_v2#oem_installation_using_the_tftp_method|the wiki]] was more misleading than helping, especally the magic number is wrong, it seems the right one is already in the normal images, so changing makes things worse.

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