I know that the first solution of this situation is
Open terminal and run command 'metacity --replace'I tried it and works fine. But if i close the terminal then titlebar gone again. So, I run another command in terminal
type 'compiz --replace' and press EnterThis kind of problem caused for some older NVIDIA and ATI graphics card. If compiz enable in these system lost titlebar effect can be seen. Best suggestion is disable compiz in the machine with NVIDIA and ATI.
I tried 'metacity --replace &' but after closing terminal the titlebar also gone outside. So I run that command in run option using keys 'Alt+F2'
I found a solution online at pendrivelinux.com. But it is for Ubuntu 7.04. I did not found and guideline here for my problem.
I also delet 'compiz' folder from 'Home' and 'File System>user' folder. But problem exists as it is.
At last I tried a simple method.
I went to 'Systems > Preferences > Startup Applications' and press 'Add' button.
In Name, wrote 'Metacity Replace Command'and saved and restart computer.
In Command, wrote 'metacity --replace'
This command will automatically triggered every time when system restart. metacity replace will start every time.
My problem was gone with this trick.