I am facing the same issue and I am trying to downgrade too. So here is my original commands that broke the whole thing:
> sudo apt-get install nvidia-current-updates nvidia-settings-updates > sudo apt-get install nvidia-current-updates-dev Edit /etc/default/grub and add vmalloc=256m to the GRUB_CMDLINE_LINUX_DEFAULT parameter list > sudo update-grub Then I tried to fix the problem with: > sudo apt-get install ubuntu-drivers-common=1:0.2.91.4 nvidia-common=1:0.2.91.4 but still does not work. dpkg -l | grep nvidia gives: ii nvidia-304-updates 304.117-0ubuntu1 ii nvidia-304-updates-dev 304.117-0ubuntu1 ii nvidia-304-common 1:0.2.91.4 ii nvidia-current-updates 304.117-0ubuntu1 ii nvidia-current-updates-dev 304.117-0ubuntu1 -dev ii nvidia-libopencl1-304-updates 304.117-0ubuntu1 rc nvidia-libopencl1-331-updates 331.38-0ubuntu7.1 ii nvidia-opencl-icd-304-updates 304.117-0ubuntu1 ii nvidia-settings 331.20-0ubuntu8 ii nvidia-settings-updates 331.20-0ubuntu8 Any help? Thanks a lot! -- Dimitrios -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1365695 Title: No longer able to use GUI after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-304-updates/+bug/1365695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs