I previously had: $ lsb_release -a Distributor ID: Ubuntu Description: Ubuntu 12.04.5 LTS Release: 12.04 Codename: precise $ dpkg -l ii nfs-kernel-server 1:1.2.5-3ubuntu3.2 support for NFS kernel server Now updated to: $ lsb_release -a Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty $ dpkg -l ii nfs-kernel-server 1:1.2.8-6ubuntu1.1 amd64 support for NFS kernel server With really ancient client. 486 ISA-only terminal. kernel vmlinuz-2.4.19-ltsp-1. This a ltsp diskless client that uses nfs as root filesystem. Before the update to Ubuntu 14.04, everything work fine, AFTER the update, no NFS Mount. Errors: > nfs: server not responding. then after several minutes: > nfs: task 82 can't get a request slot. I understand that the hardware is obsolete and rarely used these days, but up until the upgrade, it was still doing its job perferctly well.