Question: My mouse pointer became invisible after some updates after I upgraded to 15.04 from 14.10. 
In all standard settings the mouse pointer is activated (system settings, dconf...)
I also tried different cursor icons with no success.

The pointer is sometimes visible after I shut down and reboot the system. But only sometimes and I couldn't figure out a patterns why it sometimes shows up.

I found the following solution which did not work

```
gsettings set org.gnome.settings-daemon.plugins.cursor active false

```

Any help appreciated! thanks!

Answer: 
Issuing the following command will restart compiz (the window manager and decorator), without loosing your desktop and loging out (like restarting lightdm would):

```
sudo killall -i -HUP compiz

```

That brought my cursor back when it disappeared, while keeping all my windows and my currently working programs.
Same problem upgrading Lubuntu 14.04 to Lubuntu 16.04. Cursor disappear after resume. `Ctr`-`Alt`-`F1` , `Ctr`-`Alt`-`F7` solve the issue.