To all the guys who recently mentioned the WiFi issues with the E8450, I have had the same issues with both WiFi 2.4Ghz and 5Ghz disconnecting and re-connecting within seconds, especially Apple devices, no Internet intermittently although being connected to WiFi, etc. After a lot of searching and trying, the workaround that actually fixed the issues was to add
echo 0 > /sys/kernel/debug/ieee80211/phy0/aql_enable
echo 0 > /sys/kernel/debug/ieee80211/phy1/aql_enable
in the startup, initscripts, rc.local , before the exit 0 to switch off obviously buggy AQL according to
I have been running 20.03 RC3 and now RC4 with this for weeks now without any WiFi issues anymore, could you try, reboot, and feedback, if this worked for you ?