inapropriate window manager, mate-panle and session issues

[G Ferg]

Have had continuing problmes with mate-panel (not displayting) and other system messages when running some programs. I have and underlying issue that randomly the system freezes and the fan On/Off loundly.
Some reports messages referrer to unknonwn window manager.

Being a novice have had difficulty understanding the bug report process and execution. Using Ubuntu bug to report crashes, which of none generate a report when the system locks up and have to cold/hard shutdown. LightDM is the only crash report generated. Then using apport-cli to report non crash bugs. Downloading the debug packages and how to use them. Still wadding through all the documentation to comprehend and a handle on it. Having very limited wifi access makes it more time consumming.

 I have reinstalled almost anything that had to do with session, panel, greeter, mate-default settings, diplay drivers ( thats a kinky bug in itself as have to remove;
 xserver-xorg-core
 xorg then the xserver-xorg-video-hwe-16.04
 xserver-xorg-video all-hwe-16.04
 xseveer-xorg-video-all
 xserver-xorg-input-all-hwe-16.04
To rid of the Meta Pkgs
Then remove all the sub pckgs
Then do the follwoing or a report message that "remove or fix broken packages first"
 xserver-xorg-core
 xorg
Then install
Ubuntu-Mate-Core
xserver-xorg-hwe-16.04
xserver-xorg-input-all-hwe-16.04

This makes the system usable again and stops constrant lock ups for awhile.

Sorry had 3 more reports to file and just learned library clossing not a late noght as I thought.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: mate-session-manager 1.12.2-1ubuntu0.1
ProcVersionSignature: Ubuntu 4.15.0-42.45~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Dec 7 10:32:34 2018
InstallationDate: Installed on 2018-02-23 (287 days ago)
InstallationMedia: Ubuntu-MATE 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: mate-session-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Martin Wimpress  (flexiondotorg)]

Sorry, Ubuntu MATE 16.04 is now EOL.