I'm currently troubleshooting a problem with a Lubuntu Quantal setup
with LTSP (terminal server network).

Most of the clients stop responding at a blank/black screen during
bootup.  But only after successfully PXE network booting, getting DHCP
assignments, and beginning the process of booting from an NBD image on
the server.  I see the Lubuntu splash screen and then the blank/black
screen.

I set up forwarding of the client syslog messages to the server, and the
logs always end at a block of ntpd items, the last of which is
"ntpd[1314]: Listening on routing socket on fd #24 for interface
updates"

I'm using network-manager for the network configuration.  This is the
default config, except that I am using the experimental statement in
/etc/dnsmasq.d/network-manager which replaces the "bind-interfaces" line
with a "bind-dynamic" line.  That solved a client boot error "PXE-E32:
TFTP open timeout" on the only client that currently boots successfully.

This bug seems to have some behavior in common with Bug # 959037 at
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/959037
which also addresses DNS-related bootup problems.

Comments?  Troubleshooting?  Workarounds?

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https://bugs.launchpad.net/bugs/999725

Title:
  broken start-up dependencies for ntp (starts before NIS is available)

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