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Date: Wed, 28 Apr 2004 13:01:55 -0600
From: eti1 AT xmission DOT com
To: cygwin AT cygwin DOT com
Subject: '"GLX" missing on display' Problems
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Hi,

I use cygwin from home (on a Windows box) to ssh into my machine at work
(Linux box).  I get the following error when I try to run programs that use
opengl libs for displaying:

cdernst AT clinton cubit90]$ glxgears
Xlib:  extension "GLX" missing on display "localhost:10.0".
Error: couldn't get an RGB, Double-buffered visual

When I ssh, I use the -X option so that graphics get forwarded to my local
machine.  I am aware that this error is usually manifested because opengl
libs are not installed on the local machine, but I know I have them on my
local machine because if I go a 'glxgears' before ssh-ing the gears
graphics window displays just fine.  It appears that after ssh-ing into my
work machine, display information is lost.  

What is very troubling with this problem is that sometimes the problem
altogether disappears.  For example, if I ssh into my work machine and let
the terminal sit for a while, it sometimes works, sometimes not.  Other
times after ssh-ing in, if I edit a file with "vim" I can run glxgears
after, but not always.  Nothing is reproducable to get it to work.  But
once it starts displaying, it usually doesn't stop.  I tried a complete
uninstall/reinstall of cygwin but it didn't do anything.  

Help!
--Corey


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