Hot corner ubuntu 12.04
They made this a little easier to do.04, you can install the MyUnity utility (available in the repos open it up, click desktop, then 'Active "Show desktop" icon.
Also, I know this should be obvious, but if your machine won't do 3D acceleration these compiz plug-in's just plain don't work.
There is a partial answer here : The command to use is 'gsettings and the actual settings to use you can find by using: dconf watch / in the terminal, while you adjust the settings.
This extension disables the top left hot corners.You can still click on Activities or press the dedicated key to reach the overview.Configuration: Click on the "Tweaks" tab of Ubuntu Tweak (2nd tab from left) and select workspace.Fixed the issue for me, in Ubuntu.10 64bit.I'm not sure if MyUnity and this method will work pg music font suitcase for.10).I recall in researching this issue, coming across a claim that a dependent package installed with Ubuntu Tweak, corrects another issue with screen triggers being retained across reboots.
You get a bunch of statements like this: 'elementary' 'custom-command' 'none' 'xset dpms force off you want to reformat these lines into commands like this: gsettings set eferences theme 'elementary' gsettings set havior hotcorner-custom-command 'xset dpms force off' gsettings set havior hotcorner-bottomleft 'custom-command'.
Install Ubuntu Tweak: Press AltCtrlT to open the terminal and run the following commands one by one.I'm not sure if this is required but, for those that are saying it's not working for them, make sure you have "Ubuntu-Tweak" installed.On versions prior.8, may not disable other hotcorners in multiscreen configurations and won't work on fallback/flashback mode.Hare you can bind four action to four corners of your screen.Follow these steps to set it up!Changing the order in the dconf key: to read: 'core 'composite 'opengl 'decor 'gnomecompat 'resize 'snap 'move 'regex 'place 'vpswitch 'grid 'widget 'compiztoolbox 'session 'imgsvg 'mousepoll 'imgpng 'animation 'wall 'unitymtgrabhandles 'workarounds 'ezoom 'fade 'unityshell 'scale 'expo'.Just click on the drop down menu of any four of them and select show desktop.