How is it missing?
Is it missing as in you have no window border at all?
run: metacity --replace
https://help.ubuntu.com/community/Metacity
Or missing as in the name on titles?
run: gconf-editor
will pull up the config editor
go to apps>metacity>generaland you will see button_layout. The default value is:menu:maximize,minimize,close
or minimize before maximize.
I'm using Xfce ( Xubuntu ) so its a bit different in that respect.
( Xfce 4.6 seems easier now than gnome, less utility muck up and avoids even using gconf-editor, by having simplified tools. )
Also from memory common occurancy of this is because of compiz not reseting the default window manager back to metacity/xfwm4/etc. when drivers don't support 3D acceleration.
I got this trouble too.
I found the value (with gconf-editor) for the following key is missing also,
when my title-bar of every window is missing.
/desktop/gnome/shell/windows/button_layout
I set the key with value
:minimize,maximize,close
and then logout/login again
Finally, the title is appeared again.
ps. A quick way to launch gconf-editor
- Visitor 12 weeks 5 days agopress Alt-F2 > type gconf-editor > press OK
After reboot the title bar is missing again. I have to Select System -> Preferences -> Appearance, choose the Visual Effects Tab and Select Normal
- Visitor 2 years 3 weeks agoor Extra radio button
again, each time after reboot.