Archer C5400X w/ latest firmware, drops wi-fi connectivity to internet all the time.
Recently upgraded the modem firmware to version 1.1.2 Build 20191223 rel.73956(5553) using the local upgrade method (not via gui) to get my download speeds to 600 mbps (max for my cable sub).
Since then, none of my wi-fi devices will stay connected to the internet. Connectivity comes and goes randomly, one commonality is that I cannot sustain a connection through a wifi device. All my wired connections are fine so I know it is still connected to my cable modem and it still has internet connectivity.
I've tried to connect across all 3 wi-fi networks (2.4ghz, both 5ghz). isolated the number of devices connected to 1, turned off wi-fi radios to see if it was a interference issue, changed from auto channel selection to specific channels, turned on MU-MIMO, turned it back off.
Nothing works.
With the stock firmware, I couldn't get full speed from my cable connection, but the wifi connectivity was not an issue. Something happened when I upgraded.
I'd like some help please.
In the meantime, i'm going to try and apply the 1.1.2 Build 20191223 rel.73956(5553) firmware again and see if that does anything...