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Re: XDMCP Problems - Possible fix, please try
- From: Harold L Hunt II <huntharo at msu dot edu>
- To: cygwin-xfree at cygwin dot com
- Date: Mon, 05 Jan 2004 19:37:33 -0500
- Subject: Re: XDMCP Problems - Possible fix, please try
- References: <3FF3677A.2080507@msu.edu> <btcuec$kt$1@sea.gmane.org>
- Reply-to: cygwin-xfree at cygwin dot com
Andrew,
Andrew DeFaria wrote:
Sorry for the delay. We were having problems with our router and general
networking issues - not an nice environment to test things like remote X...
Well I tried that too but it didn't work. The symptoms are exactly the
same.
For kicks I tried the following:
While on sonslinux I attempted to start another X server like so:
$ X -query sonslinux :1
This brought me to another console (that I could get to by doing
Alt-Ctrl-F8 whereas my previous console is at Alt-Ctrl-F7) and started X
but KDM did not attach to it. Monitoring I see:
That is genius! I never thought of forcing people to try to make a
connection on the actual box itself.
I ran the same command on my linux box and confirmed that it does work.
I then edited (for my display manager and distribution, this will be
different for you) /etc/kde3/kdm/kdmrc, changed the following:
[XDMCP]
Enable=true
to
[XDMCP]
Enable=false
Then I restarted kdm ('/etc/init.d/kdm restart' for my dist), and ran 'X
-query %hostname% :1' again and waited about five minutes. Before five
minutes, I saw nothing: nothing special in the log files and no login
screen on Ctrl-Alt-F8. Then, after about five minutes, I saw that the
/var/log/XFree86.1.log file (and the console from which I started X)
both said:
XDM: too many retransmissions
We now know that the failure mode when XDMCP is disabled is that after a
five minute wait you get a message about too many retransmissions, even
if attempting to connect from the machine back to itself via '-query
%hostname%'. This is the same failure mode that happens with XWin.exe,
but it eliminates lots of possible problems.
To solve your problem, you need to revisit the instructions for enabling
XDMCP on your Linux box:
http://xfree86.cygwin.com/docs/faq/cygwin-xfree-faq.html#q-mandrake-8.1-xdmcp
Those instructions are not complete, but they are a start that should be
able to point you in the right direction. Confirm that you can create a
local connection via XDMCP before attempting a remote connection with
XWin.exe. Please report your results to the list so that I know if you
have fixed your problem or not.
Thanks for your help in debugging this,
Harold