Is there such a thing as a traffic/protocol analyzer for X11? I have a
self-written application (using the old XView toolkit), and under certain
circumstances some dialogs do not react. I had this 2 years ago under KDE
3.5, and some people now experience the same when SSH'ing from an OS X
machine into openSUSE or into my gentoo machine. I'd like to see what is
going on there.
A web search only found Xmon, but with most download links being dead,
even on sourceforge  there is nothing to download. But I finally found
a working download link on ubuntu.com . The package does not compile,
but I only had to comment out one line. According to the man page, the
command 'xmonui | xmond' would create another X server (localhost:1), and
I would set the DISPLAY variable to this when starting my application.
xmond will use localhost:0, that is, the real X server, to display my
application, but it will output all X traffic. So it is sort of a proxy to
the real server.
Alas, it does not work, I get a 'Can't open display' error, and xmond
outputs 'Can't open connection to Server (ECONNREFUSED)'.
Any other ideas?