Cygwin 1.7 beta XWin disconnects from Ubuntu after password

[Randall Parker <randall dot parker at gmail dot com>]

Running WinXP, latest service pak and fixes. I had problems with xwin
from the Cygwin 1.5.25-15 pegging one of my CPUs at full usage when
connecting to an Ubuntu 9.1 box. So I decided to try the 1.7 beta.
Well, now that I've upgraded I am having problems connecting to the
Ubuntu box.

I connect to the Ubuntu box and get the initial log-on screen. Typed
in user name, hit return, then got prompt for password. But as soon as
I typed in the password and hit return the XWin session immediately
exited.

I repeated this process several times.

$ cat /var/log/XWin.0.log
Welcome to the XWin X Server
Vendor: The Cygwin/X Project
Release: 1.7.1.0 (10701000)
Build Date: 2009-10-25

Contact: cygwin-xfree@cygwin.com

XWin was started with the following command line:

xwin -query 172.16.18.196

ddxProcessArgument - Initializing default screens
winInitializeDefaultScreens - w 1200 h 1600
winInitializeDefaultScreens - Returning
2009-10-30 14:21:49 _
XSERVTransSocketOpenCOTSServer: Unable to open socket for i
net6
2009-10-30 14:21:49 _XSERVTransOpen: transport open failed for inet6/SBA2UA8350Q
Y7:0
2009-10-30 14:21:49 _XSERVTransMakeAllCOTSServerListeners: failed to open listen
er for inet6
2009-10-30 14:21:49 XDMCP warning: INET6 UDP socket creation failed
2009-10-30 14:21:49 winValidateArgs - g_iNumScreens: 1 iMaxConsecutiveScreen: 1
2009-10-30 14:21:49 (II) xorg.conf is not supported
2009-10-30 14:21:49 (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for
more information
2009-10-30 14:21:49 winPrefsLoadPreferences: /etc/X11/system.XWinrc
2009-10-30 14:21:49 LoadPreferences: Done parsing the configuration file...
2009-10-30 14:21:49 winGetDisplay: DISPLAY=:0.0
2009-10-30 14:21:49 winDetectSupportedEngines - Windows NT/2000/XP
2009-10-30 14:21:49 winDetectSupportedEngines - DirectDraw installed
2009-10-30 14:21:49 winDetectSupportedEngines - DirectDraw4 installed
2009-10-30 14:21:49 winDetectSupportedEngines - Returning, supported engines 000
00007
2009-10-30 14:21:49 winSetEngine - Using Shadow DirectDraw NonLocking
2009-10-30 14:21:49 winAdjustVideoModeShadowDDNL - Using Windows display depth o
f 32 bits per pixel
2009-10-30 14:21:49 winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
2009-10-30 14:21:49 Screen 0 added at XINERAMA coordinate (0,0).
2009-10-30 14:21:49 MIT-SHM extension disabled due to lack of kernel support
2009-10-30 14:21:49 XFree86-Bigfont extension local-client optimization disabled
?due to lack of shared memory support in the kernel
2009-10-30 14:21:49 (II) AIGLX: Loaded and initialized /usr/lib/dri/swrast_dri.s
o
2009-10-30 14:21:49 (II) GLX: Initialized DRISWRAST GL provider for screen 0
2009-10-30 14:21:49 winPointerWarpCursor - Discarding first warp: 547 784
2009-10-30 14:21:49 (--) 3 mouse buttons found
2009-10-30 14:21:49 (--) Setting autorepeat to delay=500, rate=31
2009-10-30 14:21:49 (--) winConfigKeyboard - Layout: "00000409" (00000409)
2009-10-30 14:21:49 (--) Using preset keyboard for "English (USA)" (409), type "
4"
2009-10-30 14:21:49 Rules = "base" Model = "pc105" Layout = "us" Variant = "none
" Options = "none"
2009-10-30 14:21:50 winProcEstablishConnection - Hello
2009-10-30 14:21:50 winProcEstablishConnection - Xdmcp, waiting to start clipboa
rd client until 4th call...
2009-10-30 14:21:52 winInitClipboard ()
2009-10-30 14:21:52 winProcEstablishConnection - winInitClipboard returned.
2009-10-30 14:21:52 winClipboardProc - Hello
2009-10-30 14:21:52 DetectUnicodeSupport - Windows NT/2000/XP
2009-10-30 14:21:52 winGetDisplay: DISPLAY=:0.0
2009-10-30 14:21:52 winClipboardProc - DISPLAY=:0.0
2009-10-30 14:21:52 winProcQueryTree - Hello
2009-10-30 14:21:52 winProcQueryTree - Clipboard client already launched, return
ing.
2009-10-30 14:21:52 winClipboardProc - XOpenDisplay () returned and successfully
?opened the display.
2009-10-30 14:22:05 winClipboardIOErrorHandler!

2009-10-30 14:22:05 winClipboardProc - setjmp returned for IO Error Handler.
2009-10-30 14:22:05 winDeinitMultiWindowWM - Noting shutdown in progress

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