Do not know where to modify the configuration, leading to Ubuntu all the window's title bar are hidden, the net Shancha a lot of information, the solution generally is as follows:
Interim Methods: sudo metacity - replace
Method Two: Modify the / etc/X11/xorg.conf file, in the Section "Screen" to add Option "AddARGBGLXVisuals" "True"
But my computer can not find / etc/X11/xorg.conf file.
Helpless heavy equipment, the original / home adding the following configuration file, the problem has emerged, so to determine a configuration problem, not the system is broken.
After dozens of attempts, finally found the crux of the problem.
User root directory ~ / .local / share / applications / metacity.desktop
My configuration is as follows (on the left is the line number):
1 [Desktop Entry]
2 Exec = metacity
3 Hidden = true # The key is that it provoked a disaster, commented out (preceded by "#" sign) or you can delete
4 Name = Metacity
5 NoDisplay = true
6 Type = Application
7 X-GNOME-Autostart-Notify = true
8 X-GNOME-Autostart-Phase = WindowManager
9 X-GNOME-Bugzilla-Bugzilla = GNOME
10 X-GNOME-B ugzilla-Component = general
11 X-GNOME-B ugzilla-Product = metacity
12 X-GNOME-P rovides = windowmanager
13 X-GNOME-WM Name = Metacity
14 X-GNOME-WM SettingsModule = metacity
15 X-GnomeWMSettingsLibrary = metacity
16 X- Ubuntu -Gettext-Domain = metacity
Modified and saved, the write-off, re-entry, problem-solving.
Transfer from: http://www.linuxidc.com/Linux/2011-05/36406.htm Source: Linux communities on: watermoon_littlegui