I just recently formatted and reinstalled Windows 10 x64. I have not updated anything related to Cygwin and everything version-wise is just as it was. I was previously starting X with the following: $ xinit -- -multiplemonitors -multiwindow -clipboard -noprimary -dpi 96 -nolisten tcp -displayfd 3 3>/c/home/.display But now it fails to open the display: http://pastebin.com/raw/bLHTWcrS I can get around this issue by using "-listen tcp" instead of "-nolisten tcp" but I don't understand why. This is especially ironic considering that this is the complete opposite workaround to what I had to use three years ago: https://cygwin.com/ml/cygwin-xfree/2014-07/msg00017.html Matt D. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple