It doesn't happen always. I've been using Ubuntu 13.10 for few months now- and have been noticing this problem last few weeks only. Sometimes when I try to maximize a window by dragging it to the top edge of screen- I get a freeze. The only thing that moves is the cursor- and I have to hard restart my laptop by long-pressing power button- which damages the hard-drive everytime -_- Can I get a fix to this please??


This seems to be a bug in compiz: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1244754 which will be fixed in 14.04. Here's what I do when it happens:

  1. Switch to virtual console (ctrl + alt + F1)
  2. Log in with your credentials
  3. type unity --replace to restart unity
  4. Switch back to the graphical interface by pressing ctrl + alt + F7

PS: in the bug report they mention that it's safer to maximize windows via key combination or the icon in the top left of the window.


Using Ctrl+Super+ or prevents the lock up from occurring until reboot.

I've finally found the condition that causes this issue.

  1. Window geometry when it opens has the top decoration snapped to the panel and the bottom of the window is snapped to the bottom of the screen.
  2. Vertically semi-maximize the window by dragging the window to the left or right side of the screen.
  3. Drag the window to the top to maximize the window.

It's important to note the initial window geometry and the dragging to semi-maximize. If either the top of the window is not snapped or the bottom of the window is snapped, the issue does not occur. Also, using the Ctrl+Super+ or to vertically semi-maximize will avoid this issue as well.

I have the same issue in compiz 9.10.2, It has been fixed in version 9.11.

This bug was fixed in the package compiz - 1:0.9.11+14.04.20140214-0ubuntu1


You can try this:

wget http://dl.dropbox.com/u/47950494/Force_Quit.desktop
mv Force_Quit.desktop ~/.local/share/applications/

Now search the dash for "Force Quit". On clicking, you get a cross.just click the cross on the freezed window.But again,opening the dash can be a problem,in your case.

  • 1
    Yup- opening the dash is impossible while the whole desktop/keyboard is frozen – BangularTK Feb 1 '14 at 14:41
  • askubuntu.com/questions/4408/… – Terminal Feb 1 '14 at 14:48
  • Ohhhh. Very interesting!! Thanks. Although I cannot try this now- I'd have to wait till the problem reproduces itself- and then I will give it a shot. Let's see – BangularTK Feb 1 '14 at 14:56

I was able to get around with this problem safely by pressing Ctrl+Alt+F1 which will bring you to a terminal/console window then do a sudo reboot using your credentials. It happens to me randomly as well and can get annoying. I am not sure why this problem hasn't been fixed by now.

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