I’m not sure if this KDE-related or caused by something else. I have a problem with Wifi connectivity that only affects Linux machines on my network. The Wifi on these machines will disconnect and reconnect over and over. The problem seems to be intermittent.
Affected machines:
-2011 Sony laptop running Debian 12 with Plasma 5.27.
-2015 custom build desktop running openSUSE Tumbleweed with Plasma 5.27
Unaffected machines:
-The same desktop booted into Windows 10
-Surface 7+ running Windows 11
-iPhone 13 mini
Other potentially relevant info:
-Router is a Netgear AX1800
-I run a home server on Ubuntu 22.04, which has Pi-hole and Unbound running my DNS
From those logs, it definitely looks like an issue below Plasma, caused by a network misconfiguration, a bug in NetworkManager, or something else deeper.
Not sure if I’ve solved it (or at least worked around it) since it was somewhat intermittent, but turning off the smart connect between 2.4 and 5GHz seems to have stopped the issue. The two Linux machines incidentally were on 2.4 GHz, though the issue didn’t happen on Windows on the one machine while in 2.4 GHz.
Power management isn’t on, and doing these steps to disable it didn’t have an impact. It seems that disabling smart connect on the router is the only thing that’s worked.
While that seemed to stop the disconnects, disabling smart connect created other problems, namely devices that connected fine before, now will lose connection if moved around.