You assume correctly. The wall is default.
Originally Posted by ksanger
Unrelated/Unimportant background information:
The cube used to be the quintessential component of compiz, until Canonical got their hands on it and stripped it of all but the most mundane features.
The cube renders multiple desktops as sides of a three-dimensional shape, so you can have windows open on each side and rotate around to see them (or see them all at once if your cube is transparent, while being able to focus on the side in front of you).
The wall renders multiple desktops as one big flat surface, so you can have windows scattered all over it and slide around to see them; it is a generally inferior and less interesting design, but supposedly easier to understand and it gets lots of points from hardcore anti-eyecandy people.
That's a good question.
Is it normal to have to reboot Ubuntu occasionally like Windows?
Theoretically no, since it is GNU/Linux and should never have to fully reboot unless you've updated the kernel. There are a lot of ways to get around having to reboot in GNU/Linux, which is one reason network administrators like it (reboots cost time, and therefore money). If you know the tricks you only have to reboot very rarely.
However, in practice, Ubuntu gets rebooted almost as much as windows. Partly this is because some windows refugees are trying to use Ubuntu just like they used windows, and partly because all the intricate tricks to avoid having to fully reboot are well... intricate, mostly involving terminal commands and fixing text configuration files using as the super-user which is risky if you make a mistake.
Here's an example:
One day your desktop just stops; freezes.
Maybe you can still move the mouse, maybe you can't.
1. Open another tty:
The screen will be black except for some text asking you to login. This is the same username and password you usually log in with. Note that you will not be able to see your password as you type it, not even as asterisks.
Once logged in, you can check if some process is using too much cpu with: Quit top by pressing [q].
Terminate a misbehaving process with:
There are other, more intricate, ways to kill a process if killall doesn't work.
Return to your, hopefully unfrozen, desktop at tty7:2. That didn't work. Opening a tty worked, but the bad process won't die or the desktop wasn't there at tty7.
Go back to another tty1~6. You will still be logged in at the one you used before.
You can restart the entire desktop session without having to reboot:
This will close all windows and take you back to the usual graphical login screen. You might lose some data if you hadn't saved before the freeze, but this should get you back on your feet faster than a reboot.
sudo /etc/init.d/lightdm restart
3. That didn't work; maybe none of the ttys will open. This is not good, but not necessarily the worst case scenario.
There are two last-ditch key combinations.
The key combination to restart X (the GUI) is disabled by default, but its:
This has some quirky results, but if you really don't want to reboot it may help.
The "magic keys"
Hold [alt]+[SysRq] and press each letter once, slowly, in sequence. This will reboot your system, but it's a soft reboot. The system should shutdown smoothly. This also gives applications a chance to write to disk before being killed, unmounts drives, etc. and is much less risky than hitting the switch.
4. That didn't work; maybe the kernel is locked up, and that's bad, and now you have to hit the switch.
5. Actually, there are probably a dozen other ways to get out of a frozen desktop without rebooting, but they are too intricate for me.
This post is completely off topic, but it looks like it's unlikely that I will ever see full-screen windows in Ubuntu with the Compiz Cube that aren't obstructed by the unity panel.