[OpenWrt-Devel] router unielec U7628-01 won't boot - step to track down the problem ?

[davidea]

i have written to the  builder, and he sends me the breed bin file (and 
uboot too) , writing breed to flash , the router start with openwrt 
without problem ...

the the problem is how breed and uboot act at startup process ? what are 
the differences?



Il 01/10/18 01:23, davidea ha scritto:
> i have buied a router from unielec, the second unit , but this time 
> the router , arrived in working perfect condition with the factory 
> firmware (openwrt custom) , when i try to flash the last firmware , 
> won't boot ...
>
> i make some test , i hope in the right direction , but now i don't 
> have enough skill to track down the problem.
>
> i make a log with the original firmware : https://pastebin.com/Sa2XGiDP
>
> after this i write to flash the openwrt 18.06.1 
> https://pastebin.com/MVsqxpCS
>
> the router doesn't boot , all led are off , eth is up but no data come 
> from the router , in the serial consolle if i hit enter , nothings happen
>
> then i decide to try the snapshot , from 27 september , 
> https://pastebin.com/wLPNFB9h
>
> i obtain   [    1.709386] Unhandled kernel unaligned access[#1]:
>
>
> i try then to make my own snapshot, clone the repo , enable the 
> "target image : ramdisk" , adjust the dtsi  to set the serial speed 
> the same as the bootloader .... compile
>
> boot to ram : https://pastebin.com/MzTDc7Ac
>
> boot from flash after writing to flash : https://pastebin.com/bGJX4gVR
>
> in one of my test (not reported here) i see sometimes , i have an 
> error about root filsystem not set , then i add the filesystem path in 
> the dtsi file , recompile and test
>
> boot to ram : https://pastebin.com/rH6s9Dfe
>
> boot from flash after writing to flash : https://pastebin.com/FTYuC0k4
>
>
> if i write to the flash the original bin firmware, all come back ok, 
> the only difference between the two unit is that the first have a 
> breed bootloader this one have u-boot , but the developer , tell me 
> that the firmware they made is the same for both bootloader
>
>
>
> now: is correct to enable the "target image : ramdisk" to make the 
> test? are they valid as when i flash the firmware?
>
> is necessary to set the filesystem path?
>
> someone can point me on a more clear (for me)  paper about the flash 
> structure , and how it is detected?
>
> unfortunately i'm unable to resolve this error, then i need some big 
> help from the comunity , but i can make the test ...
>
> if needed the maker grant me the permission to share the bin file , 
> but not the source code about this image ,,,,
>
>
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