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:
- Switch to virtual console (ctrl + alt + F1)
- Log in with your credentials
unity --replaceto restart unity
- 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.
- 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.
- Vertically semi-maximize the window by dragging the window to the left or right side of the screen.
- 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.
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.