Here is a more detailed analysis of the results and logs: This is what happens on the thin client (I can only take a screenshot):
[image: Inline image 1] This is the log on the server: Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 available DHCP range: 172.16.0.20 -- 172.16.0.50 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 vendor class: udhcp 0.9.9-pre Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 DHCPDISCOVER(br0) 52:54:00:c5:0e:33 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 tags: br0 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 DHCPOFFER(br0) 172.16.0.20 52:54:00:c5:0e:33 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 requested options: 1:netmask, 3:router, 6:dns-server, 12:hostname, Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 requested options: 15:domain-name, 17:root-path, 28:broadcast, Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 bootfile name: /ltsp/i386/pxelinux.0 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 next server: 172.16.0.1 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 1 option: 53:message-type 02 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 54:server-identifier 172.16.0.1 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 51:lease-time 00:00:a8:c0 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 58:T1 00:00:54:60 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 59:T2 00:00:93:a8 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 1:netmask 255.255.255.0 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 28:broadcast 172.16.0.255 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 3:router 172.16.0.1 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 4 option: 6:dns-server 172.16.0.1 Nov 21 14:59:03 Ashton dnsmasq-dhcp[317]: 2840456473 sent size: 14 option: 17:root-path /opt/ltsp/i386 The dnsmasq config is as follows: roland@Ashton:/opt/ltsp$ egrep -rv '^#|^$' /etc/dnsmasq* /etc/dnsmasq.conf:interface=br0 /etc/dnsmasq.d/libvirt-bin:bind-interfaces /etc/dnsmasq.d/libvirt-bin:except-interface=virbr0 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:port=53 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:domain-needed /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:bogus-priv /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:log-dhcp /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:tftp-root=/var/lib/tftpboot /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:dhcp-boot=/ltsp/i386/pxelinux.0 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:dhcp-option=17,/opt/ltsp/i386 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:dhcp-no-override /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:pxe-prompt="Press F8 for boot menu", 3 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:pxe-service=X86PC, "Boot from network", /ltsp/i386/pxelinux /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:pxe-service=X86PC, "Boot from local hard disk", 0 /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:dhcp-range=172.16.0.20,172.16.0.50,255.255.255.0,12h /etc/dnsmasq.d/ltsp-server-dnsmasq.conf:dhcp-option=252,"\n" /etc/dnsmasq.d-available/libvirt-bin:bind-interfaces /etc/dnsmasq.d-available/libvirt-bin:except-interface=virbr0 The file /opt/ltsp/i386/usr/share/initramfs-tools/scripts/init-premount/udhcp has been modified: if udhcpc -n -s /tmp/dhcp-script.sh -i $i $hostname_param $ip_param >/dev/null 2>&1; then After modification, the following was run: $ sudo chroot /opt/ltsp/i386 update-initramfs -u $ sudo ltsp-update-kernels Thereafter we have this: $ cat /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default default ltsp label ltsp kernel vmlinuz append ro initrd=initrd.img quiet splash nbdport=2002 nbdroot=:ltsp_i386 Even after rebuilding the client chroot as below, there is no change in behaviour. $ sudo ltsp-update-image -a i386 -o "quiet splash nbdport=2002"
<<udhcpc_failing.png>>
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