did you set the right options to create a netboot initramfs in /etc/initramfs-tools/initramfs.conf and updated the initramfs with update-initramfs -u ?
nfs root works fine for plenty ltsp users in feisty and it seems it also worked flawlessly when the netbooting installer images were tested (according to https://www.stgraber.org/ubuntu/isotesting/test/173)
did you set the right options to create a netboot initramfs in /etc/initramfs- tools/initramfs .conf and updated the initramfs with update-initramfs -u ?
nfs root works fine for plenty ltsp users in feisty and it seems it also worked flawlessly when the netbooting installer images were tested (according to https:/ /www.stgraber. org/ubuntu/ isotesting/ test/173)