[K12OSN] How do i enable XDMCP in K12ltsp 4.2.0 ?

Petre Scheie petre at maltzen.net
Tue Mar 29 14:24:52 UTC 2005


Just adding my two cents to muddy the waters: I moved my test server the other day; it 
has only one client, and also is my desktop machine.  After the move, the client hung at 
trying to load the kernel, due to a closed port courtesy of iptables.  Opened that port, 
rebooted the client--and it hung at the nfs mounts.  Opened those ports in iptables, 
reboot the client--and got the grey screen with the X.  The LTSP docs say the client 
isn't communicating with the Window Manager, which happens on port 177.  Opened *that* 
port in iptables, and now everything else is working.  I suspect that prior to moving I 
had just turned iptables off.  I just offer this as something to check, since before I 
started opening ports, I went through checking to make sure everything was 
running--tftp, xdmcp, etc.--and it was, but it turned out not to be related to the problem.

Petre

Eric Harrison wrote:
> On Mon, 28 Mar 2005, Rob Owens wrote:
> 
>> Every time I run ltspadmin it tells me XDMCP is not
>> running, even though my system is working fine.  Maybe
>> some of my config files aren't exactly right, but like
>> I said, it is working for me.
> 
> 
> I just checked a fresh install and ltspadmin also reports
> that XDMCP is not running. Ltspadmin used to recognize
> the default K12LTSP install settings, I'll have to look
> to see what changed.
> 
>> I think if you get a gray screen with an X in the
>> middle and it hangs there, then XDMCP is the culprit.
>> But if you don't even get the gray screen, then I
>> think maybe it's a problem w/ your video mode and
>> you'll have to take a look at lts.conf
>>
>> ...but I'm no expert
> 
> 
> DNS problems can also cause the grey-screen-of-death.
> 
> Kjell, can you tell us a little bit about your setup?
> Is it a default install (two ethernet cards, with eth0
> having the IP address of 192.168.0.254)?
> 
> Did you do anything different or special?
> 
> -Eric
> 
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