Can't update firmware on new wrt1900acs v2

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Kors
DD-WRT Novice


Joined: 24 Jul 2018
Posts: 1

PostPosted: Tue Jul 24, 2018 19:24    Post subject: Can't update firmware on new wrt1900acs v2 Reply with quote
Hello,

I got my wrt1900acs v2 finally.
Unfortunately trying to flash without luck, always get back with the original linksys firmware.
Anything I may do wrong?

Thanks.
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dertester123
DD-WRT Novice


Joined: 17 Jul 2011
Posts: 12

PostPosted: Fri Jul 27, 2018 19:48    Post subject: Reply with quote
Hi,

i had the same with my 1900acs v1.

Follow this :
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=313590

Strange thing is, that even a Serial Flash didnt help.
My stock firmware was on part 2 and every time i was set back to partition 2 even if i flashed ddwrt or stock to partition 1.

What helped me was to flash ddwrt to both partitions.

A few hints:
The 1900ACS needs the serial adapter plugged (in my case ground or tx) after switched on. So basically i had 3-5 seconds to plug in Serialcable and enter flash mode.

I havent tried to flash stock now to partition 1 and change. Maybe with the next update Smile

Hope that helps!

//My guess to this behaviour:
Maybe 1900acs gets a little crazy when you flash stock to partition 2 accidentially? Im not sure but maybe than prevents partition switching?
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 905
Location: Louisiana, USA

PostPosted: Sat Jul 28, 2018 11:28    Post subject: Reply with quote
Downgrade the Linksys firmware then try flashing DD-WRT.
https://wiki.openwrt.org/toh/linksys/wrt_ac_series#linksys_oem_builds

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bartskate
DD-WRT Novice


Joined: 09 Aug 2018
Posts: 1

PostPosted: Thu Aug 09, 2018 15:44    Post subject: Reply with quote
I am having the same issue on a 1900acs v1.
I have tried downgrading the stock firmware as suggested, which is successful, but then when I flash DD-WRT it reverts to the downgraded stock partition. I am using the current beta for this device.
ppomes
DD-WRT Novice


Joined: 09 Aug 2018
Posts: 2

PostPosted: Thu Aug 09, 2018 22:54    Post subject: Workaround for initial installation Reply with quote
For some reason the latest factory-to-ddwrt.bin images for the WRT1900AC V2 didn't work for me. What I eventually tried that worked was going back to a January 2018 factory-to-ddwrt.bin image. After it installed I was able to load the 28-July-2018 ddwrt-linksys-wrt1900acv2-webflash.bin image.
myersw
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Joined: 13 Jun 2006
Posts: 1606
Location: SE Michigan USA

PostPosted: Fri Aug 10, 2018 16:35    Post subject: Re: Workaround for initial installation Reply with quote
ppomes wrote:
For some reason the latest factory-to-ddwrt.bin images for the WRT1900AC V2 didn't work for me. What I eventually tried that worked was going back to a January 2018 factory-to-ddwrt.bin image. After it installed I was able to load the 28-July-2018 ddwrt-linksys-wrt1900acv2-webflash.bin image.


And when you did the webflash you overwrote the Linksys partition. If you plan on staying with dd-wrt then no biggie.

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ppomes
DD-WRT Novice


Joined: 09 Aug 2018
Posts: 2

PostPosted: Sun Aug 12, 2018 21:30    Post subject: Reply with quote
Quote:
And when you did the webflash you overwrote the Linksys partition. If you plan on staying with dd-wrt then no biggie.


That's all I ran and updated on the previous WRT1200AC unit until the 5 GHz radio permanently gave up the ghost. It would have been nice to keep the factory firmware on a "just in case" basis. Since the recent factory-to-ddwrt.bin images aren't working on virgin hardware, this is the route I had to take to obtain an up-to-date version.

Cheers and thanks to everyone.

Paul Pomes, DVM
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