I am also having major issues with Ubuntu 13.04 with an Nvidia Titan. As the OP stated I'm also running the latest 'Titan supported' drivers. X at the moment will not even log in. The only way to get partial functionality is to revert to nouveau
I am also having major issues with Ubuntu 13.04 with an Nvidia Titan. As the OP stated I'm also running the latest 'Titan supported' drivers. X at the moment will not even log in. The only way to get partial functionality is to revert to nouveau