Found good workaround (almost solution): Installing native drivers from Nvidia solves issue.
I installed this version - http://www.nvidia.com/Download/driverResults.aspx/77525/en-us 1) Download file from nvidia site 2) Add nouveau driver to blacklist (add "blacklist nouveau" to /etc/modprobe.d/blacklist (create this file, if it does not exist)) 3) then run sudo update-initramfs -u 4) then reboot 5) chmod +x _here_is_path_to_downloaded_nvidia_driver_, then run it Before step 5 you probably need to reboot to level 3 After this, Kubuntu works perfectly (like before upgrade) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1363408 Title: nvidia proprietary drivers are broken To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1363408/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
