Linksys WRT1900ACS v2 trouble flashing

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ffsmith20
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Joined: 09 May 2020
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PostPosted: Sat May 09, 2020 19:07    Post subject: Linksys WRT1900ACS v2 trouble flashing Reply with quote
Downloaded the current factory to ddwrt bin file, did a factory reset before installing...upgraded using bin file, router rebooted after install but booted back into linksys gui instead of ddwrt....any direction would be appreciated
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kernel-panic69
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Joined: 08 May 2018
Posts: 7249
Location: Texas, USA

PostPosted: Sat May 09, 2020 21:02    Post subject: Reply with quote
All you should have had to do was use the factory-to-ddwrt image.

DD-WRT Installation, Upgrade & Basic Setup–Cliff Notes

Where Do I Download Firmware?

Firmware FAQ

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2019/

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2020/

New Build - 05/07/2020 - r43078 (r43084)

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ffsmith20
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Joined: 09 May 2020
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PostPosted: Sat May 09, 2020 21:25    Post subject: Reply with quote
Thats what I thought....i did that and nothing....boots right into linksys gui
kernel-panic69
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Joined: 08 May 2018
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PostPosted: Sat May 09, 2020 21:27    Post subject: Reply with quote
With which firmware image...?
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ffsmith20
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Joined: 09 May 2020
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PostPosted: Sat May 09, 2020 21:33    Post subject: Reply with quote
Build 40559

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2019/08-06-2019-r40559/linksys-wrt1900acsv2/factory-to-ddwrt.bin

Thats the file I downloaded
kernel-panic69
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Joined: 08 May 2018
Posts: 7249
Location: Texas, USA

PostPosted: Sat May 09, 2020 23:05    Post subject: Reply with quote
Read the second link I posted, the big bold red letters. You could probably also peruse this forum area's build release threads. That build was not a good build, and likely, the image may have been too big to flash to begin with. There is a LOT of useful information in the first link I posted, which is a sticky at the top of this forum. Simply put, do not use the router database, and do some research. I don't make specific notes, but the information is here in the forum as far as what builds are good, which ones a junk, etc.
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ffsmith20
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Joined: 09 May 2020
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PostPosted: Sat May 09, 2020 23:25    Post subject: Reply with quote
I now see that build was from 2019....didn't realize that...
kernel-panic69
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Location: Texas, USA

PostPosted: Sat May 09, 2020 23:54    Post subject: Reply with quote
Yep, and as I suspected and thought I remembered correctly, it was in the big middle of when firmware images were too big to flash to the smaller partition and you have to have a previous build already installed to flash via CLI or use a workaround to get it to flash:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320763

I was hoping one of the Marvell regulars would've chimed in on specific go-to builds for initial flash and such.

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Shovelhead
DD-WRT Novice


Joined: 23 May 2020
Posts: 2
Location: Gotland, Sweden, Europe

PostPosted: Sat May 23, 2020 11:36    Post subject: Reply with quote
Exactly the same problem here... After flashing my WRT1900ACS v2 with Build 40559 the router boots back to Linksys... I suppose I have to find a better build.
oliver44
DD-WRT User


Joined: 01 Jun 2016
Posts: 86

PostPosted: Sat May 23, 2020 12:43    Post subject: Reply with quote
I had the same problem once I switched from the original linksys firmware,before writing an image with ddwrt you should clean the registers with ccleaner and only after you start writing the ddwrt software.
And try using waterfox or microsoft edge when writing a ddwrt firmware, this works for me and yes you shouldn't have other active extensions like adblock ...

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Linksys WRT1900ACS v.2 - SuperWrt/OpenWrt
WDR3600 rev.1.5 - SuperWrt/OpenWrt
https://superwrt.download/
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Shovelhead
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Joined: 23 May 2020
Posts: 2
Location: Gotland, Sweden, Europe

PostPosted: Sat May 23, 2020 13:14    Post subject: Reply with quote
I managed to install the latest build r42681 from Linksys factory firmware. In a few minutes I will found out if it works.
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kernel-panic69
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Joined: 08 May 2018
Posts: 7249
Location: Texas, USA

PostPosted: Sat May 23, 2020 16:16    Post subject: Reply with quote
42681 is not the latest, it's from back in March:

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2020/

Please report in the 42681 build thread, if you would. Then check the release threads for newer builds since 42681 and upgrade at your leisure. The most recent is 05-22-2020-r43217

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DON'T use Chromium-based browsersRTFM/STFW - TL;DR is NOT an excuse. • Why Should I Care What Color the Bikeshed Is?
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SurprisedItWorks
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Joined: 04 Aug 2018
Posts: 947
Location: Appalachian mountains, USA

PostPosted: Sat May 23, 2020 20:53    Post subject: Reply with quote
FWIW, an old build that plays well on that router, say for an initial install, is 40009. For a reasonably new one, so far I'm having decent results with 42926 from mid-April, which is listed on the download sites as 42925 (no reason... happens sometimes). I think I recall that it may have issues if you have Windows machines sharing drives on the network. If that matters, check the new-build thread carefully. The newer builds have mostly (I'm not caught up browsing the newer new-build threads) had more problems discussed in the new-build threads than this one has had.

If you plan to set up wireguard, see if you can find a very, very new build that is not giving Marvell people problems, because the wireguard interface has been evolving rapidly.

Whatever you do, do not flash ANYTHING without reading its new-build thread first. People have bricked routers by blindly assuming the latest is the greatest. Often it isn't. Even these "unbrickable" two-partition routers can be bricked by a build that is seriously enough malformed. Go back and read the Marvell new-build thread for 08-31-2019-r40863 for some light but alarming reading.

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Five WRT1900ACSv2's on 42926, 44048.
VLANs, multiple VAPs, NAS, client-mode travel router, OpenVPN client (AirVPN), DDNS, wireguard server, two wireguard clients (AzireVPN), use of two DNSCrypt DNS providers (inc Quad9) through OpenVPN and wireguard clients.
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