Could this be a duplicate of https://bugs.launchpad.net/ubuntu/+source/libcgroup/+bug/693594?
I had problems with "modprobe -r" hanging, and after that any attempt to do anything with modules also hung. After much testing I discovered that cgroups was to blame, and setting cpu.rt_runtime_us in the sysdefault cgroup as suggested in comment 13 in that bug fixed the problem. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libcgroup in Ubuntu. https://bugs.launchpad.net/bugs/598335 Title: gnome locks up with cgroup-bin installed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libcgroup/+bug/598335/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs