[gl2ps] Problem in X11

[Duncan Murdoch]

We're using gl2ps in the rgl package in R.  It works fine in Windows and 
OSX, but we get a crash when running on Red Hat.  I'm not very familiar 
with Linux or X11; can someone on this list tell me if we're doing 
things wrong?

Here's the error:

X Error of failed request:  GLXBadContextState
   Major opcode of failed request:  145 (GLX)
   Minor opcode of failed request: 5 (X_GLXMakeCurrent)
   Serial number of failed request:  183
   Current serial number in output stream:  183

This happens during a glXMakeCurrent call just after a call to 
gl2psBeginPage, and kills the process.  Is that expected?  There's no 
crash in X11 on OSX, or when using wglMakeCurrent in Windows.  If I 
delete the glXMakeCurrent call things seem to work, so I have a workaround.

Duncan Murdoch