I was also experiencing this problem. After some googling I found a thread that specifies this to be an Nuvou drivers issue (or rather missing Nvidia drivers). To correct the problem install the nvidia drivers. You can do this on the login screen press ctrl+alt+F2, which will bring you to a TTY interface. Login there and issue sudo apt-get install nvidia-current sudu reboot (or hard rebot as I had to do one).
Once you restart the issue should be mitigated. However, the problem with the drivers should still be investigated. I am not sure what logs I can provide but I have taken a snapshot of all of them. I am attaching the faulty Xorg logs ** Attachment added: "Xorg with Nuvou driver failure" https://bugs.launchpad.net/ubuntu/+source/xubuntu-meta/+bug/1313402/+attachment/4102019/+files/Xorg.0.log.old ** Package changed: xubuntu-meta (Ubuntu) => xserver-xorg-video-nouveau (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1313402 Title: Ubuntu 14.04 freezes on login Status in “xserver-xorg-video-nouveau” package in Ubuntu: Confirmed Bug description: I recently upgraded my Xubuntu installation to 14.04. After doing so, I have been unable to use my system. It will boot fine, load up my home screen, and after a few minutes, will freeze. Nothing can be done, no commands give any response. I can sometimes move the mouse around, but cannot click on anything or make any changes to the system. The only option I have is to use the power button to force it to turn off. My first thought is that it is maybe a graphics card issue, that somehow when updating, it turned off the third-party packages to run NVIDIA. However, since it freezes so soon (and sooner every time you boot), it is almost impossible to diagnose the issue. Help? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1313402/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
