Think the regulatory domain is not being set anywhere as /etc/default/crda has REGDOMAIN= and sudo cat /run/netplan/wpa- wlan0.conf has
ctrl_interface=/run/wpa_supplicant network={ ssid="SHEW-DB9990" key_mgmt=WPA-PSK psk="nope" } Might explain 'ieee80211 phy0: brcmf_escan_timeout: timer expired' above. https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/crda.git/tree/README#n8 For manual changing of regulatory domains use iw (iw reg set) or wpa_supplicant. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1862760 Title: Unreliable 802.11ac connection on our raspi images To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1862760/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs