I've been using cygwin with XWin server for decades. On one of my Windows 11 laptops, I'm running into a problem where upon launching the XWin server, I see a large black filled-in rectangle (opaque) which fills about 20% of the display. This rectangle has no decorations, so there is no way to grab/resize/move/identify it. It doesn't allow me to see through it to the desktop below. I just updated the cygwin installation on this laptop using the setup-x86_64.exe, version 2.934 and the installation shows I got cygwin.dll version 3.4.10 (based on the cygcheck -s -v -r output). I launch the X server using the following command: C:\Apps\cygwin\bin\run.exe --quote /usr/bin/bash.exe -l -c "cd; exec /usr/bin/startxwin -- -listen tcp -emulate3buttons" This black rectangle issue is newly noticed as I just started trying to use a new large display connected to the PC via a USB to HDMI adapter. I've been noticing on my other Windows PC that from time to time, there is a region roughly the same size where although I can see the desktop, I'm unable to click through to any of the shortcuts in the region. I now think that region is the same rectangle - it's just that it's not black and opaque on the other PC, and it doesn't do it all the time. When I notice this happening, I usually just stop the X Server and restart it and it's fine. On this problem laptop, each time I start the X Server, the black, opaque rectangle appears, but it seems to only happen when I'm displaying to a second display via a USB - HDMI display adapter or viewing the laptop via an RDP session. When I'm accessing the laptop native display directly, the X Server seems to start just fine and there is no black rectangle. I keep the XServer running through the use of the .startxwinrc file in my HOME directory. This file includes a single line used to launch an executable "xnoexit.exe" application, which is basically just a compiled C program that does a sleep forever which allows the X Server to keep running until commanded to exit. I did replace that xnoexit.exe command with a simple /usr/bin/xload command to make sure that wasn't the issue. When I did that, I saw the xload application launch, so I can see the change worked, but the black rectangle still appeared while the X Server was running. Is there any way to determine what is causing this? I really want to be able to use this laptop while displaying via the USB -> HDMI adapter to the second display, as it's a much larger display (3840x1600), which is much nicer to use than the laptop's native 1920x1080 display. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
