Hello @pepe2k,
I'm seeking information about the status of 2.4GHz band support for the TP-Link Archer A9 v6 on OpenWRT. The commit 9c335acc and the pull request #9389 by @looi have been highlighted, and I'm eager to know if these efforts have made any progress. As it is now 2024, I am still hopeful for a positive update that would enable me to transition to OpenWRT for my Archer A9 AC1900. I also kindly request assistance from any other developers who may have this device, urging them to contribute to resolving any unsupported issues. I remain hopeful that the development for this device is ongoing and not abandoned.

Can you elaborate on how you managed to solve it, might help the rest in future :smiley:

If someone can provide the dd-wrt team, the serial boot log and a full flashdump for this router it can help them i guess.

@spike0en patches sent upstream with support for QCN550x in ath9k are marked as "under review":*

When they get merged we will probably have them backported during some of next mac80211 upgrade. I no longer have access to device with this radio so I'm not able to help.


I just purchased an Archer A9 I am new to this community, If I was to install the OpenWRT firmware would this unit currently support 2.4Ghz? Was this patch merged? Also can it just be put into AP mode so it can work side by side with my Netgate firewall? I just want it to be in a bridge mode basically nothing more. This would be my first OpenWRT useage.

Can confirm that 2.4 ghz band works with this unofficial build :smiley:

But you can't install most of the packages due to some kernel incompatibility concerns. I guess it works with official releases only.

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With the build I just used the "non snap shot" only 5ghz works for the Archer A9, everything else is working great. I was testing it in AP mode.

Try the unofficial build instead. Afaik, the patches have not been merged with the stable branch yet. Also we dont have an active developer working on this device at the moment.

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I messed up something I was trying to revert back to factory firmware because it was running slower I had only 30mbps on my 1gpbs fiber line. Before with factory firmware I got avg 150-200mbps. I am doing tftp server like the older Cisco routers but the device won’t grab the firmware. It acts like it didn’t take the firmware, I attempted first to reinstall factory firmware it in the GUI of OpenWrt. I have my IP set and my tftp server running on my laptop like you would with the Cisco routers and it just won’t pull the software. I would love to test it but it’s acting like it’s stuck. I will figure it out. Where do I get the dev image?

Ok the system is now recovered with a TFTP firmware reimage. Where do I find that snapshot build??

Is it this one

factory right?

If you use the link you provided, you are installing somebody else's image that is not from the OpenWrt project.

I'd recommend installing from the official project unless there is a reason you want to use an alternate build (in which case, please ask the maintainer of that build for help).

If you prefer snapshot, just change the dropdown from 23.05.3 > snapshot.

Thanks for the reply, the current image for the Archer A9 cuts the speed from factory firmware that is running at 150-300mbps on my 1gbps line to around 30-54mbps on OpenWrt I think that unsupported 2.4ghz has something to do with it as it only runs the 5ghz. It is a drastic change in speed. I turned off software hardware flow control also, no change even 40,80,160 channel width. The image works but it’s got some significant speed issues that need mitigation.

We can start looking at your config.

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall