Title bar disappears suddenly when Compiz is enabled

Question

I am running Lubuntu 11.10 (LXDE based on Ubuntu 11.10). A few days ago, I installed the Macbuntu, but it isn't compatible with LXDE and so, I uninstalled it. And today I installed Compiz (I have tried to install Compiz in Lubuntu 11.10 before and everything goes well at that time). I tried to run Compiz with the command compiz --replace and everything seems ok. But after a short time (usually within three minutes), the title bar and taskbar disappeared suddenly, and I cannot open any program with the hot key (e.g. I usually open the terminal with Ctrl+Alt+T, but it doesn't work at that time).

I can do nothing but kill the Xorg and stop the Compiz in tty1. Now the system is fine without Compiz. But when I try to run Compiz, the horrible thing will happen again. and I noticed that, usually when I close a window, or change the configuration of Compiz, the title bar would disappear suddenly. I really don't know how I can fix it. Can anyone give a hand to me?

Another: i have run gtk-window-decorator --replace to start the window decoration, i got the error:

Failed to load theme "Ambiance": Failed to find a valid file for theme Ambiance


(gtk-window-decorator:3994): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE

Solution 1

maybe it has some connection with some animation adds-on, such as beam, when open those special effects, compiz will crash. though i didnt know why

Solution 2

Try to run compiz setting manager than(you can run it from terminal typing ccsm). Than enable than disable Windows Decoration than restart your computer.

Solution 3

I faced title-bar-disappear issue on Ubuntu 14.04. I resolved it by restarting the unity service.

sudo service lightdm restart

Comments

[hingev]

I have that problem too but when I press Ctrl+Alt+Del and log out and then log back in, everything goes right. The title bar disappears only when I change my desktops. How many desktops do you have in Compiz general settings?

[jokerdino]

possible duplicate of Enabling Compiz Disables Windows Title Bar - Why?

[Sk4ry]

i have looked through the question you referred to. but nothing help. @jokerdino

[Tachyons]

Try emerald it may help you

[Sk4ry]

thx, i have installed it. now everything goes fine without such crash animation(e.g. beam .etc), just leave it at that :)

[nilsonneto]

@MarkZar - please add what you have done as an answer and accept it by clicking that tick button so that the question can be closed. thanks.

[FantomX1]

doesnt work for me on ubuntu 20

[FantomX1]

I might have needed also along 'gtk-window-decorator --replace' command, and a successful restart and logout prior are also very necessary as you mention