deb http://ppa.launchpad.net/portis25/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/portis25/ppa/ubuntu karmic main加入源后只需
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 27F5B2C1B3EAC8D9
sudo apt-get update
sudo apt-get install totem-pps
