After upgrading to **16.04** from **15.10** it was running smoothly for about one week, then it started getting random crashes and freezes and now all the windows borders disappeared. I would include a screenshot but the keyboard shortcut for screenshots doesn't work.

**Launcher is missing, and the global menu/ top bar is also missing. Right now my firefox window is maximized to the top and fills the screen like if I had pressed F11 to run it fullscreen. None of the keyboard shortcuts work.**

Can't open a terminal using Ctrl + Alt + T. I finally managed to get a terminal open and ran unity --debug and this is the result. [opened the terminal using ctrl+space to open synapse, apparently that works and also copying in terminal and pasting firefox also works]

```
unity --debug
unity-panel-service stop/waiting
unity7 stop/waiting
unity-panel-service start/running, process 2515
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
/usr/bin/compiz (core) - Info: Loading plugin: core
/usr/bin/compiz (core) - Info: Starting plugin: core
[New Thread 0x7ffff3638700 (LWP 2588)]
/usr/bin/compiz (core) - Info: Loading plugin: ccp
/usr/bin/compiz (core) - Info: Starting plugin: ccp
[New Thread 0x7fffeb20e700 (LWP 2590)]
compizconfig - Info: Backend     : gsettings
compizconfig - Info: Integration : true
compizconfig - Info: Profile     : unity
[New Thread 0x7fffeaa0d700 (LWP 2591)]
/usr/bin/compiz (core) - Info: Loading plugin: composite
/usr/bin/compiz (core) - Info: Starting plugin: composite
/usr/bin/compiz (core) - Info: Loading plugin: regex
/usr/bin/compiz (core) - Info: Starting plugin: regex
/usr/bin/compiz (core) - Info: Loading plugin: commands
/usr/bin/compiz (core) - Info: Starting plugin: commands
/usr/bin/compiz (core) - Info: Loading plugin: resize
/usr/bin/compiz (core) - Info: Starting plugin: resize
/usr/bin/compiz (core) - Info: Loading plugin: place
/usr/bin/compiz (core) - Info: Starting plugin: place
/usr/bin/compiz (core) - Info: Loading plugin: move
/usr/bin/compiz (core) - Info: Starting plugin: move
/usr/bin/compiz (core) - Info: Loading plugin: snap
/usr/bin/compiz (core) - Info: Starting plugin: snap
/usr/bin/compiz (core) - Info: Loading plugin: session
/usr/bin/compiz (core) - Info: Starting plugin: session
/usr/bin/compiz (core) - Info: Loading plugin: imgpng
/usr/bin/compiz (core) - Info: Starting plugin: imgpng
/usr/bin/compiz (core) - Info: Loading plugin: compiztoolbox
/usr/bin/compiz (core) - Info: Starting plugin: compiztoolbox
/usr/bin/compiz (core) - Error: Plugin 'opengl' not loaded.

/usr/bin/compiz (core) - Info: Loading plugin: mousepoll
/usr/bin/compiz (core) - Info: Starting plugin: mousepoll
/usr/bin/compiz (core) - Info: Loading plugin: vpswitch
/usr/bin/compiz (core) - Info: Starting plugin: vpswitch
/usr/bin/compiz (core) - Info: Loading plugin: workarounds
/usr/bin/compiz (core) - Info: Starting plugin: workarounds
/usr/bin/compiz (core) - Error: Plugin 'opengl' not loaded.

```

There is one error of opengl plugin not loading. Is that the problem?