Here you have information how to enable backports: http://www.addictivetips.com/ubuntu-linux-tips/how-to-enable-backports-in-ubuntu-linux/
Don't forget about attach your ~/.xsession-errors file
Here you have information how to enable backports: www.addictiveti ps.com/ ubuntu- linux-tips/ how-to- enable- backports- in-ubuntu- linux/
http://
Don't forget about attach your ~/.xsession-errors file