This started happening on my Win XP Pro box today. (everything was working fine last Friday but I have rebooted since then)
I have two monitors, one LCD, one CRT, both have 32 bit pixel depth. The symptoms are that X windows display properly on the LEFT monitor but do not refresh/draw on the Right (windows stays blank, white). It does not seem to matter which is primary. It does not seem to matter where the task bar is (ie, which monitor) Curiously enough, it is important which monitor is on the LEFT (ie, Properties, Settings, if you drag the monitors around, X displays properly on the monitor which is configured on the LEFT - regardless of whether it is primary) I tried updating to the latest ATI Catalyst drivers (which caused me grief when I tried to rotate the LCD again but I managed to overcome that one) the startxwin.bat contains... (with comments removed) %RUN% XWin -multiplemonitors -multiwindow -clipboard -silent-dup-error The c:\cygwin\tmp\XWin.log contains... Welcome to the XWin X Server Vendor: The Cygwin/X Project Release: 6.8.2.0-4 Contact: cygwin-xf... </groups/unlock?msg=b18d8c26ce4c13f2&_done=/group/comp.windows.x/browse_ thread/thread/16d8adde26bda8e9/b18d8c26ce4c13f2> @cygwin.com XWin was started with the following command line: /usr/X11R6/bin/XWin -multiplemonitors -multiwindow -clipboard -silent-dup-error ddxProcessArgument - Initializing default screens winInitializeDefaultScreens - w 1024 h 1280 winInitializeDefaultScreens - Returning _XSERVTransmkdir: Cannot create /tmp/.X11-unix with root ownership (II) XF86Config is not supported (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information (==) FontPath set to "/usr/X11R6/lib/X11/fonts/misc/,/usr/X11R6/lib/X11/fonts/TTF/,/usr/X11R6 /lib/X11/fonts/Type1/,/usr/X11R6/lib/X11/fonts/CID/,/usr/X11R6/lib/X11/f onts/75dpi/,/usr/X11R6/lib/X11/fonts/100dpi/" winAdjustVideoModeShadowGDI - Using Windows display depth of 32 bits per pixel winScreenInit - Monitors do not all have same pixel format / display depth. Using primary display only. winAllocateFBShadowGDI - Creating DIB with width: 1024 height: 1280 depth: 32 winInitVisualsShadowGDI - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp 32 null screen fn ReparentWindow null screen fn RestackWindow InitQueue - Calling pthread_mutex_init InitQueue - pthread_mutex_init returned InitQueue - Calling pthread_cond_init InitQueue - pthread_cond_init returned winInitMultiWindowWM - Hello winMultiWindowXMsgProc - Hello winMultiWindowXMsgProc - Calling pthread_mutex_lock () winInitMultiWindowWM - Calling pthread_mutex_lock () 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=500, rate=31 (--) winConfigKeyboard - Layout: "00000409" (00000409) (--) Using preset keyboard for "English (USA)" (409), type "4" (--) 3 mouse buttons found Could not init font path element /usr/X11R6/lib/X11/fonts/TTF/, removing from list! Could not init font path element /usr/X11R6/lib/X11/fonts/Type1/, removing from list! Could not init font path element /usr/X11R6/lib/X11/fonts/CID/, removing from list! Could not init font path element /usr/X11R6/lib/X11/fonts/100dpi/, removing from list! winMultiWindowXMsgProc - pthread_mutex_lock () returned. winProcEstablishConnection - Hello winInitClipboard () winClipboardProc - Hello DetectUnicodeSupport - Windows NT/2000/XP winProcEstablishConnection - winInitClipboard returned. winInitMultiWindowWM - pthread_mutex_lock () returned. winClipboardProc - DISPLAY=127.0.0.1:0.0 winMultiWindowXMsgProc - pthread_mutex_unlock () returned. winMultiWindowXMsgProc - DISPLAY=127.0.0.1:0.0 winInitMultiWindowWM - pthread_mutex_unlock () returned. winInitMultiWindowWM - DISPLAY=127.0.0.1:0.0 winInitMultiWindowWM - XOpenDisplay () returned and successfully opened the display. winMultiWindowXMsgProc - XOpenDisplay () returned and successfully opened the display. winClipboardProc - XOpenDisplay () returned and successfully opened the display. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/