Upgrading Linksys WRT1900AC to 21.02 fails

Installing and Using OpenWrt
1

We have a Linksys 1900 AC we are trying to upgrade with OpenWRT installed.
We last updated in 2019.

I get the following error when upgrading:
The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform.

I am using the web interface and uploading the *.bin file.

We are trying the to use the following:
openwrt-21.02.2-mvebu-cortexa9-linksys_wrt1900ac-v1-squashfs-sysupgrade.bin
openwrt-mvebu-cortexa9-linksys_wrt1900ac-v1-squashfs-sysupgrade.bin

Please help.

2

Follow the instructions presumably seen on the GUI upgrade screen, force upgrade, do not keep config. Many threads on this topic to be found.

2 Likes
3

Thanks for the post:
I do not see a force upgrade.
I have selected "do not keep config"

Does the filename end with *.bin

Here is the system info:
Hostname
OpenWrt
Model
Linksys WRT1900AC
Architecture
ARMv7 Processor rev 2 (v7l)
Firmware Version
OpenWrt 18.06.2 r7676-cddd7b4c77 / LuCI openwrt-18.06 branch (git-19.020.41695-6f6641d)
Kernel Version
4.14.95
Local Time
Wed Mar 2 21:15:16 2022
Uptime
0h 6m 45s
Load Average
0.10, 0.04, 0.01

4

As you are on a mamba device, there is a kernel reservation space change which will require you to use the factory image rather than the sysupgrade image.

5

" As you are on a mamba device, there is a kernel reservation space change which will require you to use the factory image rather than the sysupgrade image."

Thank you ! How do I install a factory image:

6

Use the Firmware Selector to download the factory image.

https://firmware-selector.openwrt.org/?version=21.02.2&target=mvebu%2Fcortexa9&id=linksys_wrt1900ac-v1

Then, "upgrade" using that image, and don't keep your configs.

You might back them up first and use them as a guide reconfigure for 21.02

1 Like
7

The devicepage https://openwrt.org/toh/linksys/wrt1900ac should have some useful information on that.