Comment 63 for bug 569841

I'm experiencing the same behavior with Ubuntu 20.04 on an older laptop with a Dell/Broadcom BCM43228 NIC. Kernel is 5.4.0-52-generic. Below is an example from syslog. Periodically the WiFi just stops working and takes a long while to resume again. Anyone have any tips from troubleshooting/fixing??

NetworkManager[720]: <info> [1604262830.0384] device (wlp2s0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
NetworkManager[720]: <info> [1604262830.0388] device (wlp2s0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
NetworkManager[720]: <info> [1604262830.0394] manager: NetworkManager state is now CONNECTED_LOCAL
NetworkManager[720]: <info> [1604262830.0424] manager: NetworkManager state is now CONNECTED_SITE
NetworkManager[720]: <info> [1604262830.0438] policy: set '(network name)' (wlp2s0) as default for IPv4 routing and DNS
NetworkManager[720]: <info> [1604262830.0455] device (wlp2s0): Activation: successful, device activated.
systemd[1]: systemd-rfkill.service: Succeeded.
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: message repeated 6 times: [ wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet]
chromium_chromium.desktop[6308]: [6308:6451:1101/153351.623591:ERROR:connection_factory_impl.cc(428)] Failed to connect to MCS endpoint with error -105
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: message repeated 8 times: [ wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet]
systemd-resolved[619]: Using degraded feature set (UDP) for DNS server 192.168.4.1.
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: wlp2s0: WPA: Key negotiation completed with 48:dd:0c:c3:47:66 [PTK=CCMP GTK=CCMP]
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: message repeated 15 times: [ wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet]
systemd-resolved[619]: Using degraded feature set (UDP) for DNS server 68.237.161.12.
systemd-resolved[619]: Using degraded feature set (TCP) for DNS server 192.168.4.1.
systemd-resolved[619]: Failed to send hostname reply: Invalid argument
systemd-resolved[619]: message repeated 2 times: [ Failed to send hostname reply: Invalid argument]
wpa_supplicant[765]: wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet
wpa_supplicant[765]: message repeated 30 times: [ wlp2s0: WPA: EAPOL-Key Replay Counter did not increase - dropping packet]