Distributed Multihead X

[Peter Hutterer]

On Tue, Feb 01, 2011 at 06:56:31PM -0700, tom fogal wrote:
> We're having some issues getting our software to work on a display well
> which is configured to use DMX.
> 
> We're pretty sure the issue started coming up when we began dlopen()ing
> the OpenGL library.  The problem appears to be getting NULL function
> pointers when glXGetProcAddressARB'ing some or all OpenGL functions
> (though I'll note that I do not have access to the failing system --
> however we've seen that crash many times before and the crash report is
> consistent).
> 
> Looking at the docs that are available, it seems like there should
> be some sort of GLX proxy library -- perhaps a full replacement for
> libGL, since GLX must live in the GL library?  My hypothesis is that
> we're loading the 'backend' GLX library, i.e. what the GLX proxy should
> be forwarding to, instead of the proxy itself, and therefore Badness
> ensues.
> 
> Side note, is DMX alive?  I mean, it appears to be shipping and all,
> but the main source of documentation is dmx.sf.net -- which hasn't seen
> an update since 2004.

it's alive in terms of we try to keep it building and sometimes someone even
runs it. it hasn't had a maintainer for ages.

Cheers,
  Peter

> I haven't found much documentation as to the architecture.  If someone
> could enlighten me, it would be much appreciated.
> 
> Thanks for any help,