Crash when remote desktop changes screen resolutions

[Ed Avis <ed at membled dot com>]

With Windows XP every PC can run the remote desktop service which you
can connect to with rdesktop.  The last couple of times I've tried
this it has crashed XWin.exe.  My machine normally has two monitors at
1280x1024, 32-bit colour, but when connecting with rdesktop I use
1024x720, and I think the colour depth is lower too since some icons
look a bit funny.  Here is the XWin.log from the most recent crash.
It seems to show that the crash happened when I went back to the local
screen and unlocked it.

Welcome to the XWin X Server
Vendor: The Cygwin/X Project
Release: 4.3.0.66
Contact: cygwin-xfree@cygwin.com

XWin was started with the following command line:

/usr/X11R6/bin/XWin -clipboard 

ddxProcessArgument - Initializing default screens
winInitializeDefaultScreens - w 1280 h 1024
winInitializeDefaultScreens - Returning
OsVendorInit - Creating bogus screen 0
winValidateArgs - g_iNumScreens: 1 iMaxConsecutiveScreen: 1
winDetectSupportedEngines - Windows NT/2000/XP
winDetectSupportedEngines - DirectDraw installed
winDetectSupportedEngines - DirectDraw4 installed
winDetectSupportedEngines - Returning, supported engines 00000007
winScreenInit - dwWidth: 1280 dwHeight: 1024
winSetEngine - Using Shadow DirectDraw NonLocking
winAdjustVideoModeShadowDDNL - Using Windows display depth of 32 bits per pixel
winCreateBoundingWindowWindowed - User w: 1280 h: 1024
winCreateBoundingWindowWindowed - Current w: 1280 h: 1024
winAdjustForAutoHide - Original WorkArea: 0 0 996 1280
winAdjustForAutoHide - Adjusted WorkArea: 0 0 996 1280
winCreateBoundingWindowWindowed - WindowClient w 1274 h 971 r 1274 l 0 b 971 t 0
winCreateBoundingWindowWindowed -  Returning
winCreatePrimarySurfaceShadowDDNL - Creating primary surface
winCreatePrimarySurfaceShadowDDNL - Created primary surface
winCreatePrimarySurfaceShadowDDNL - Attached clipper to primary surface
winAllocateFBShadowDDNL - lPitch: 5096
winAllocateFBShadowDDNL - Created shadow pitch: 5096
winAllocateFBShadowDDNL - Created shadow stride: 1274
winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
winInitVisualsShadowDDNL - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp 32
winRandRInit ()
winCreateDefColormap - Deferring to fbCreateDefColormap ()
winFinishScreenInitFB - returning
winScreenInit - returning
InitOutput - Returning.
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
(--) Setting autorepeat to delay=250, rate=31
(--) winConfigKeyboard - Layout: "00000809" (00000809) 
(--) Using preset keyboard for "English (United Kingdom)" (809), type "4"
Rules = "xfree86" Model = "pc105" Layout = "gb" Variant = "(null)" Options = "(null)"
Could not init font path element /usr/X11R6/lib/X11/fonts/CID/, removing from list!
winPointerWarpCursor - Discarding first warp: 637 485
winBlockHandler - Releasing pmServerStarted
winBlockHandler - pthread_mutex_unlock () returned
winProcEstablishConnection - Hello
winInitClipboard ()
winProcEstablishConnection - winInitClipboard returned.
winClipboardProc - Hello
DetectUnicodeSupport - Windows NT/2000/XP
winClipboardProc - DISPLAY=127.0.0.1:0.0
winClipboardProc - XOpenDisplay () returned and successfully opened the display.
winClipboardWindowProc - WM_DRAWCLIPBOARD - Initializing - Returning.
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt () failed: 887601c2
winShadowUpdateDDNL - IDirectDrawSurface4_Blt failure message maximum (10) reached.  No more failure messages will be printed.
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 2
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 2
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 2
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 2
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 1
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Blt reported that the primary surface was lost, trying to restore, retry: 2
winBltExposedRegionsShadowDDNL - IDirectDrawSurface4_Restore returned: DD_OK
winWindowProc - WM_DISPLAYCHANGE - orig bpp: 32, last bpp: 32, new bpp: 8
winWindowProc - WM_DISPLAYCHANGE - new width: 1024 new height: 720
winWindowProc - Disruptive change in depth
winDisplayDepthChangeDialog - DialogBox returned: 8585334
winDisplayDepthChangeDialog - GetLastError: 6
winReleasePrimarySurfaceShadowDDNL - Hello
winReleasePrimarySurfaceShadowDDNL - Detached clipper
winReleasePrimarySurfaceShadowDDNL - Released primary surface
winCreatePrimarySurfaceShadowDDNL - Creating primary surface
winCreatePrimarySurfaceShadowDDNL - Could not create primary surface: 8876024e
winWindowProc - WM_ACTIVATE - Bad depth, trying to override window activation
winWindowProc - WM_ACTIVATE - Bad depth, trying to override window activation
winWindowProc - WM_ACTIVATE - Bad depth, trying to override window activation
winWindowProc - WM_ACTIVATE - Bad depth, trying to override window activation
winWindowProc - WM_ACTIVATE - Bad depth, trying to override window activation
winChangeDelthDlgProc - wParam == s_pScreenInfo->dwBPP
winWindowProc - WM_DISPLAYCHANGE - orig bpp: 32, last bpp: 8, new bpp: 32
winWindowProc - WM_DISPLAYCHANGE - new width: 1280 new height: 1024
winReleasePrimarySurfaceShadowDDNL - Hello
winReleasePrimarySurfaceShadowDDNL - Released primary surface
winCreatePrimarySurfaceShadowDDNL - Creating primary surface
winCreatePrimarySurfaceShadowDDNL - Could not create primary surface: 8876024e
winClipboardProc - Call to select () failed: -1.  Bailing.
winClipboardProc - XDestroyWindow succeeded.


-- 
Ed Avis <ed@membled.com>