title: X does not start after cygwin upgrade
body: <p>After upgrading Cygwin the X Server does not start. As far as I can tell the only error message from the command output is:</p>
  
  <blockquote>
    <p>xinit: XFree86_VT property unexpectedly has 0 items instead of 1</p>
  </blockquote>
  
  <p><code>/var/log/xwin/XWin.0.log</code> does not have this message.  I have pasted the entire output is at the bottom. </p>
  
  <p>After initally installing from a cygwin mirror, I had used <a href="https://sourceware.org/cygwinports">Cygwin Ports</a> to get a recent version of <code>git</code>. My latest update was from Cygwin mirror. Could that have caused the problem?</p>
  
  <p>I have already tried reinstalling everything from cygwin mirror, using the reinstall option for every category. Do I have any other option besides uninstalling everything and reinstalling?</p>
  
  <pre>
  $ /usr/bin/startxwin
  
  Welcome to the XWin X Server
  Vendor: The Cygwin/X Project
  Release: 1.16.2.0
  OS: CYGWIN_NT-6.1 OAKN00563024A 1.7.33-2(0.280/5/3) 2014-11-13 15:47 x86_64
  OS: Windows 7 Service Pack 1 [Windows NT 6.1 build 7601] (Win64)
  Package: version 1.16.2-1 built 2014-11-11
  
  XWin was started with the following command line:
  
  /usr/bin/XWin :0 -multiwindow -nolisten tcp -auth
   /home/I063510/.serverauth.1328
  
  (II) xorg.conf is not supported
  (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information
  LoadPreferences: /home/I063510/.XWinrc not found
  LoadPreferences: Loading /etc/X11/system.XWinrc
  LoadPreferences: Done parsing the configuration file...
  winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL
  winDetectSupportedEngines - Returning, supported engines 00000015
  winSetEngine - Multi Window or Rootless => ShadowGDI
  winScreenInit - Using Windows display depth of 32 bits per pixel
  winAllocateFBShadowGDI - Creating DIB with width: 1600 height: 900 depth: 32
  winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
  winInitVisualsShadowGDI - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp 32
  MIT-SHM extension disabled due to lack of kernel support
  XFree86-Bigfont extension local-client optimization disabled due to lack of shared memory support in the kernel
  glWinSelectGLimplementation: Loaded 'cygnativeGLthunk.dll'
  GL_VERSION:     4.3.0
  GL_VENDOR:      NVIDIA Corporation
  GL_RENDERER:    Quadro K2100M/PCIe/SSE2
  (II) AIGLX: enabled GLX_SGI_make_current_read
  (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
  (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
  (II) AIGLX: enabled GLX_SGIX_pbuffer
  (II) AIGLX: enabled GLX_ARB_multisample and GLX_SGIS_multisample
  (II) 1002 pixel formats reported by wglGetPixelFormatAttribivARB
  (II) AIGLX: Set GLX version to 1.4
  (II) 825 fbConfigs
  (II) ignored pixel formats: 0 not OpenGL, 54 RBGA float, 87 RGBA unsigned float, 0 unknown pixel type, 36 unaccelerated
  (II) GLX: Initialized Win32 native WGL GL provider for screen 0
  winPointerWarpCursor - Discarding first warp: 800 450
  (--) 8 mouse buttons found
  (--) Setting autorepeat to delay=500, rate=31
  (--) Windows keyboard layout: "00000409" (00000409) "US", type 7
  (--) Found matching XKB configuration "English (USA)"
  (--) Model = "pc105" Layout = "us" Variant = "none" Options = "none"
  Rules = "base" Model = "pc105" Layout = "us" Variant = "none" Options = "none"
  winInitMultiWindowWM - DISPLAY=:0.0
  winMultiWindowXMsgProc - DISPLAY=:0.0
  winProcEstablishConnection - winInitClipboard returned.
  winClipboardThreadProc - DISPLAY=:0.0
  OS maintains clipboard viewer chain: yes
  winMultiWindowXMsgProc - XOpenDisplay () returned and successfully opened the display.
  winInitMultiWindowWM - XOpenDisplay () returned and successfully opened the display.
  winClipboardProc - XOpenDisplay () returned and successfully opened the display.
  xinit: XFree86_VT property unexpectedly has 0 items instead of 1
  xinit: connection to X server lost
  
  waiting for X server to shut down winClipboardProc - winClipboardFlushWindowsMessageQueue trapped WM_QUIT message, exiting main loop.
  winClipboardProc - XDestroyWindow succeeded.
  winClipboardIOErrorHandler!
  winMultiWindowXMsgProcIOErrorHandler!
  winInitMultiWindowXMsgProc - Caught IO Error.  Exiting.
  winDeinitMultiWindowWM - Noting shutdown in progress
  (EE) Server terminated successfully (0). Closing log file.
  </pre>