Re: Unable to start session using XDMCP

[Jon TURNEY]

On 13/07/2011 15:04, Alexander Pokluda wrote:
 I have attached two packet captures. In the first file, it appears
 that the remote GDM stops responding after sending the accept packet
 but the capture in the second file was taken immediately after the
 first capture and restarting XWin.

Looking at those packet captures, I can't see anything that XWin is doing
wrong.  So I can only offer generic advice: Are the Manage requests arriving
at and being accepted by the remote host?

 On Wed, Jul 13, 2011 at 8:29 AM, Jon TURNEY jon.tur...@dronecode.org.uk 
 wrote:
 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.
[snip]

 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

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Re: Unable to start session using XDMCP

[Jon TURNEY]

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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