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[ubuntu] Dell XPS 1340 keyboard lock when adjust backlit brightness

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http://ubuntuforums.org – I'm running 12.04 on a Dell XPS 1340. When I toggle the brightness on the backlit keyboard using the Fn-right arrow keys my keyboard will lock but the trackpad and BlueTooth mouse continue to work, I thought it may have been a DE issue but to date I've had this problem on gnome3 (both classic and new), XFCE, Unity, and KDE. The only way I found to fix it is a reboot, restarting the shell or logging off/on will not bring the keyboard back. Any help on solving this is welcomed. Thanks (Hardware)