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I have a dual monitor setup using Gnome3 on Ubuntu 12.04.1.

Misc Info: In the past I used Fedora, there was a pointer barrier between my two monitors in the upper left corner so that I can hit the hot corner when moving from the right monitor to the left monitor.

Problem: However, with my new Ubuntu installation, the barrier no longer exists and my mouse pointer glides straight to the next screen. This makes that hot corner nearly useless.

I've looked around, messed with the values in /usr/share/gnome-shell/js/ui/layout.js, but I can't figure out how to make the pointer barrier work. Does anyone have a suggestion?

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