This isn't really a driver question, but I'm just wondering if anyone has been able to successfully upgrade the Ubuntu 12.04 LTS file system used in the Ubuntu on Zynq design to Ubuntu 14.04 LTS. I'm able to upgrade OK, but when I try to log in I get "Failed to start session". So far, all efforts to correct this have been fruitless. If anyone out there has any suggestions, I'd like to hear them. Thanks.