Running Ubuntu 12.04 During installation of a few programs (Gparted and some others) my computer unexpectedly shut down. When I restarted my machine everything appeared normal. However, every program I open, whether it be terminal or Firefox, the title bar is missing. In other words there is no window dialogue other than File, Edit, View, etc... I don't have the option to close, minimize or maximize. In addition to the absent title bar things don't seem to load quite right. For example, when I load Firefox and go to google.com search results seem to be improperly underlined/not underlined at all. Picture quality is not bad; things just don't load fully/corrupted looking textures and graphics.
Log in with Unity 2D, open
I had this error today too and that worked for me.
Thanks to Ryan McClure for this addition:
If by any chance Unity 2D has the same issue (it happened to me once before, so I can relate :P) and neither shell does not allow you to open terminal, press Ctrl+Alt+F1 to open a TTY session. From here, enter your username and password and continue to do the commands thonixx gave you.
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After running Pinta on 12.04 today, my windows borders and title bars disappeared.
I got them back running CCSM - Effects - Window decoration: turn
In the past, when this would happen, we would simply run
An easier way was to use
By the way, it's the window decorator that is in charge of the titlebar, etc.