Sitsofe:
1) uninstalling Envy won't solve the problem. Envy is just a PyGTK application which compiles the driver. On the contrary, uninstalling the nvidia-glx packages will solve the problem.
Envy does not use the distinction between nvidia-glx and nvidia-glx-new.
2) Restricted Drivers Manager is a nice application but is limited to the version of the drivers available in Ubuntu's repositories. Envy provides you with the latest version of both the Nvidia and the ATI driver.
Sitsofe:
1) uninstalling Envy won't solve the problem. Envy is just a PyGTK application which compiles the driver. On the contrary, uninstalling the nvidia-glx packages will solve the problem.
Envy does not use the distinction between nvidia-glx and nvidia-glx-new.
2) Restricted Drivers Manager is a nice application but is limited to the version of the drivers available in Ubuntu's repositories. Envy provides you with the latest version of both the Nvidia and the ATI driver.