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I have Ubuntu and GNOME 3 and when I do Alt+Left-click it grabs the current window. How do I stop this from happening, as I need this shortcut in Blender which I update often so changing it inside Blender is not logical.

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In your Compiz Config Settings Manager click on "Move Window" plugin. Click on the very first mouse shortcut (it should be <ALT>Button1) and Disable it.

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I have tried this but every time it it dont work, if i reopen Compiz Config Settings Manager its reverted back to alt+button1 – Steven Jun 15 '12 at 13:41
What if you try to delete the value in gconf-editor? Key is stored in /apps/compiz-1/plugins/move/screen0/options – jasmines Jun 15 '12 at 14:11
never mind i fixed in the thge keyboard layout app, changed the setting under the layouts tab to the second option and it seems to have fixed my issue. – Steven Jun 15 '12 at 14:24

If CompizConfig doesnt work for you, try this:

Fix using dconf Editor

Install dconf Editor:

sudo apt-get install dconf-editor

Search for dconf Editor in dash and run it, then search for mouse-button-modifier and change the key from <Alt> to <Super> or anything else. That worked for me.

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Try using Xubuntu instead. I struggled a bunch with this, and was pointed toward Xubuntu because its interface steals from apps less, and is more customizable.

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The question is about GNOME. An answer about switching desktop environments is an bit out of scope I think. – gertvdijk Oct 12 '13 at 20:36

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