I can confirm, that this is a dublicate bug. libhwloc-plugins is installed on all my machines.
No Nvidia libraries proposed for installation any more. It, however, seems to be necessary to remove nvidia-libopencl1-331-updates nvidia-settings manually in oder to obtain an update of libhwloc-plugins (1.8-1ubuntu1) to 1.8-1ubuntu1.14.04.1 and to obtain ocl-icd-libopencl1 (2.1.3-4) Remarkable: No Nvidia cards. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403008 Title: nvidia-331-updates wrongly installed by an upgrade prevent GNOME shell to start To manage notifications about this bug go to: https://bugs.launchpad.net/hundredpapercuts/+bug/1403008/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs