Spotify (here):
Can you start spotify from a terminal window and see if it outputs any error messages when this occurs? (Ctrl+Alt+T) to open terminal and then type spotify &
To close spottily: select it and press Alt+F4
or in a terminal type killall spotify
.
Mouse restart (from here and here):
If you are stuck with no mouse movement on your laptop (touchpad) then press the key combinations Alt+F2 and type in
gksudo modprobe -r psmouse
Type in the password, press enter, and then press Alt+F2 again for entering the following
gksudo modprobe psmouse
Thats it. Your mouse pointer will start working again.
If you like to do it through the terminal, then type in gnome-terminal after pressing Alt+F2
When the terminal open up type the following
sudo modprobe -r psmouse
sudo modprobe psmouse
If your usb mouse is getting stuck, then use the following command after pressing Alt+F2
gksudo /etc/init.d/hotplug restart