When connected to a 5GHz (802.11ac) WPA2 wireless network with UFW firewall enabled at system startup , I experience intermittent issues where the Wi-Fi completely disconnects and the 5G network is no longer displayed in the list of Wi-Fi Networks.
Toggling the "Enable Wi-Fi" option resets the Wi-Fi and allows the user to reconnect.
The latest A10 firmware version is installed on the laptop.
I confirmed that the 5G network was still up and running , so the issue is most likely not on the router network end.
I have no custom firewall rules that would cause this behaviour , but I do see a lot of multicast address resolution requests being blocked in the ufw logs.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.2.0-35-generic 4.2.0-35.40~14.04.1
ProcVersionSignature: Ubuntu 4.2.0-35.40~14.04.1-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Apr 18 18:32:30 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-03-03 (45 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
SourcePackage: linux-lts-wily
UpgradeStatus: No upgrade log present (probably fresh install)
This looks more likely to be a kernel (driver) issue, reassigning.