Comment 18 for bug 999725

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?