[ubuntu] HP Pavilion dm1 - Ubuntu 12.04 - mouse pad and keyboard hang

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http://ubuntuforums.org – I installed Ubuntu 12.04 along with Windows on my HP Pavilion dm1. After 'some time', the keyboard and the mouse pad 'hang'. No way to move. Windows works, but I have the same problem when I attach a dongle for 3G-connection. I can work for some time, then it hangs... I contacted the HP service center, because I think this is a basic problem. They just say: 'This model is not guaranteed to work with Ubuntu - we don't look at it...' 1) does anyone knows how I can fix the problem? 2) does anyone have the same experience? what can I tell the HP people to look into my problem? Thank y (Hardware)