Try installing the following code
sudo aptitude purge envy
sudo rm Â*rf /usr/share/envy
Edit//ignore this line-really stupid typo sudo aptÂ*get clean
sudo apt-Â*get clean
wget
http://www.linuxmint.com/upload/envy...untu11_all.deb
sudo dpkg Â*i envy_0.9.7Â*0ubuntu11_all.deb
rm envy_0.9.7Â*0ubuntu11_all.deb
Then uninstall and install the driver again with envy
Actually someone in another linux forum had a similar problem....read
here