Edubuntu 14.04.1 updates break TFTP

[John Hupp]

On 2/10/2015 7:17 PM, Adam Fischer wrote:
> Hello,
>
> We've been using LTSP for a long time, but found that with Ubuntu 
> 14.04, that installing a quick-and-easy LTSP setup from initial OS 
> install was hard to come by.  Edubuntu was always something I wanted 
> to try, knowing that you used LTSP, so I decided to try it out.
>
> The install is marvelously simple.  After the OS install, I plug in a 
> Diskless Workstation, and it boots up right away.
>
> The problem is that after I do an apt-get upgrade, the thin client can 
> no longer get any TFTP response from the server.
>
> sudo service tftpd-hpa status
>
> Shows that it is running.  Though to be honest, I don't know if it's 
> the necessary process or not.
>
> I have to imagine I'm not the only one who has run into this, as it 
> seems like something that would happen fairly commonly to anyone using 
> Edubuntu 14.04 and doing regular updates.
>
> Things I have attempted:
>
> Rebooting
> sudo ltsp-update-kernels
> sudo ltsp-update-image
>
> Has anyone else run into this, or know what I should do?  If I have to 
> mark a package so that it doesn't update, I can do that, but I don't 
> know which package to mark.
>
> If someone could at least try and replicate this issue, that would do 
> wonders, as it would point me toward some sort of hardware issue, too.
>

I'm running Lubuntu 14.04.1 for the server, and my initial LTSP-PNP 
setup results in TFTP Open Timeout errors during client boot.  The fix 
for that in my environment is to edit /etc/dnsmasq.d/network-manager and 
replace the "bind-interfaces" line with a "bind-dynamic" line.