Re: Unable to start session using XDMCP

[Jon TURNEY <jon dot turney at dronecode dot org dot uk>]

On 12/07/2011 22:15, Alexander Pokluda wrote:
> I have run into a problem again where I am unable to start a session
> using XDMCP. I am trying to connect to multiple remote machines
> running CentOS 5.5 using XWin 1.10.2.
> 
> When I run the command
> 
> xwin -nodecoration +xinerama -screen 0 @1 -screen 1 @2 -from
> 10.3.12.47 -query 10.3.147.22
> 
> I get two black windows (with no titlebars) that do nothing for a
> while and then eventually close and reopen. If I watch what's
> happening using Wireshark, I see
> 
> Local Machine		Remote Machine
> ---------------		---------------
> Query
> 			Willing
> Request
> 			Accept
> Manage
> Manage
> Manage
> (many more times)

This seems slightly different to that failures you were seeing before, where
the Request packet did not arrive at the destination (although the reason for
that was never clear)

Can you send me the corresponding .pcap file, please.

> If I look in the XWin log, I see
> 
> [...]
> [719987.046] XDM: too many retransmissions, declaring session dead
> [...]
> 
> (the full log is pasted below). Oddly, for some remote machines, I
> occasionally see this behaviour while most of the time it works but
> for others, I seem to get this behaviour all the time and it never
> seems to work.
> 
> Any help would be greatly appreciated.

This seemed to be working for you back in March (see [1]), so I guess the
important question is "what has changed?"

[1] http://cygwin.com/ml/cygwin-xfree/2011-03/msg00011.html

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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