ASUS RT-AC66U stuck at recovery page after flash DD-WRT

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Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 6868
Location: Romerike, Norway
PostPosted: Sat May 21, 2016 14:45    Post subject: Reply with quote
I don't experience any boot-loop. I have The original CFE 1.0.1.4

I don't know if reset works on newer builds. It was an issue after 26138.

1) Flash 26138
2) Reset nvram
3) Flash latest(I am on 29621) without a reset.
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ghostwolf59
DD-WRT Novice


Joined: 22 May 2016
Posts: 9
PostPosted: Sun May 22, 2016 10:17    Post subject: Reply with quote
nopper wrote:
I'm afraid ASUS will close their hardware Sad With new CFE DD-WRT won't work:
http://www.snbforums.com/threads/asus-firmware-will-change-the-verification-method.32357/

I have successfully downgrade CFE 1.0.2.0 (EU) to 1.0.1.6 (EU) and now i can install any DD-WRT firmware.

I have downgraded on 3 devices RT-AC66U:
ASUS RT-AC66U:
H/W Version: B0 hw_version=1.5
CFE: 1.0.2.0 bl_version=1.0.2.0
EU version

Dont forget, make a original CFE backup!!!

Check H/W version (1.50) and flash vendor, i've tested only ZENTEL. Replace mac adresses.

Command to check flash vendor:
Code:
dmesg | grep -e "flash" -e "nand" -e "amd" /tmp/syslog.log

Quote:
Found a Zentel NAND flash with 2048B pages or 128KB blocks; total size 128MB


Hi
I cant upload the DD-WRT firmware on my router so these are my questions...

Executing the "
Quote:
dmesg | grep...
" command I can see the "
Quote:
Found a Zentel NAND flash with 2048B pages or 128KB blocks; total size 128MB
" you refer to - does that mean I have the later CFE or ...?

1. How do I do a CFE backup?
2. Should I apply both files you provided or is the just the old and new CFE's? How do I apply this ? Via the web interface or from a command line option?
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ghostwolf59
DD-WRT Novice


Joined: 22 May 2016
Posts: 9
PostPosted: Sun May 22, 2016 10:19    Post subject: Reply with quote
nopper wrote:
I'm afraid ASUS will close their hardware Sad With new CFE DD-WRT won't work:
http://www.snbforums.com/threads/asus-firmware-will-change-the-verification-method.32357/

I have successfully downgrade CFE 1.0.2.0 (EU) to 1.0.1.6 (EU) and now i can install any DD-WRT firmware.

I have downgraded on 3 devices RT-AC66U:
ASUS RT-AC66U:
H/W Version: B0 hw_version=1.5
CFE: 1.0.2.0 bl_version=1.0.2.0
EU version

Dont forget, make a original CFE backup!!!

Check H/W version (1.50) and flash vendor, i've tested only ZENTEL. Replace mac adresses.

Command to check flash vendor:
Code:
dmesg | grep -e "flash" -e "nand" -e "amd" /tmp/syslog.log

Quote:
Found a Zentel NAND flash with 2048B pages or 128KB blocks; total size 128MB


Hi
I cant upload the DD-WRT firmware on my router so these are my questions...

Executing the "
Quote:
dmesg | grep...
" command I can see the "
Quote:
Found a Zentel NAND flash with 2048B pages or 128KB blocks; total size 128MB
" you refer to - does that mean I have the later CFE or ...?

1. How do I do a CFE backup?
2. Should I apply both files you provided or is the just the old and new CFE's? How do I apply this ? Via the web interface or from a command line option?
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Kaisersose
DD-WRT Novice


Joined: 21 May 2016
Posts: 3
PostPosted: Sun May 22, 2016 11:46    Post subject: Reply with quote
Per Yngve Berg wrote:
I don't experience any boot-loop. I have The original CFE 1.0.1.4

I don't know if reset works on newer builds. It was an issue after 26138.

1) Flash 26138
2) Reset nvram
3) Flash latest(I am on 29621) without a reset.


I already tried with some 25xxx release, nothing changed.
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nopper
DD-WRT Novice


Joined: 30 Apr 2016
Posts: 8
PostPosted: Fri May 27, 2016 6:38    Post subject: Reply with quote
First flash DD WRT from router database:
v24 PreSP2 [Beta] Build: 21061
http://www.dd-wrt.com/routerdb/de/download/Asus/RT-AC66U/-/dd-wrt-Asus_RT-AC66U.trx/3899

Then reset to factory via web panel and upgrade via web panel to any version.


There is a tutorial how to backup CFE:
https://tosiek.pl/asus-rt-ac66u-cfe-and-dd-wrt-on-hw-version-b0/
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