I upgraded the 3.x version to a newer 3.x version via the online method and then to 4.2.0 and then 4.2.1 manually. What I experience now with the newest firmware is that both 2.4 and 5Ghz WiFi signals become unstable after a while and connections to both LAN and WAN destinations won’t work anymore after a while and ping time become huge. A simple - but annoying - solution is to reconnect the wifi.
This doesn’t happen at all with the same laptop device on another wifi access point in my home.
This could be unrelated to your recent update to newer firmware. I noticed the same issue with WiFi disconnects about two days ago (only one 5G network used). I just checked my firmware and noticed it was on an older version - 3.x (I know, horrible security on my part). So apparently the older version also has this problem, at least in my case.
I’m updating to the latest version and also enabling auto-upgrade, lest I forget to check it for another 6 months again. I’ll be checking this thread daily to see if any solution to the WiFi disconnects, and also to report if my AX1800 is experiencing them again.
I’ve done the upgrade to 4.x using the online method, so I guess that should be yes to your question? The other minor upgrades I did manually, not using the uboot version which also wasn’t necessary I read
I also already restarted the router as an attempt to solve the issue btw.
This doesn’t work though. The uboot update always fails (I tried different versions) and complains about wrong file size of something about ART on a device with unknown FLASH. I verified the hash of the .img file and it’s as advertised on the download page
Edit: I managed to perform the uboot upgrade, although it was quite confusing on how to do it.
So everything is up to date, try turning off Disassociate On Low Acknowledgement
located in the LuCi Wireless menu. Click edit for the wireless SSID it is disconnecting from, go to interface configuration and click the advance settings tab will be bottom of page.
I am finding 5Ghz is unstable, specifically for Nintendo products. We have a few Nintendo Switches here and they all seem to be unable to connect to the 5Ghz network they were connected to previously on 4.2.0.