openGL problem in cygwin-xfree?
Gene C. Ruzicka
gcruzicka@comcast.net
Sat Jan 1 09:24:00 GMT 2005
> First, I hope I've directed this question to the correct
> mailing list: I'm not sure if it's pertinent to this list
> or to the cygwin list.
>
> I frequently use cygwin-xfree to log onto external
> host machines, usually Solaris or SGI-based.
> This environment worked quite well for me
> until recently, when I updated my Cygwin
> installation. Ever since then, it appears, that none
> of the openGL applications running on the host
> machine have been able to access openGL in the
> cygwin-xfree server. For example, here is the
> error message I get from an application based on
> TCL/TK scripting, which interfaces with openGL
> using the togl package:
>
> Togl: couldn't get visual while executing
> "togl $dw -width $wwidth -height $wheight -rgba true -double true
> -depth true -ident Box2 -overlay true"
>
> Apparently, the TCL/TK application can't locate the openGL
> facility, anywhere. Another application, the CFD visualization
> software FIELDVIEW, does not work when openGL graphics
> are specified specified, but works fine when X-based graphics are
> specified.
>
> Has anyone experienced anything like this recently, and/or
> can they assist in finding this problem? I've attached the
> cygcheck output, and I've tried re-installing the openGL
> libary, with no success. I'm contemplating simply
> reinstalling all of cygwin-xfree, if worse comes to worse.
>
> Thanx in advance for any help. The cygcheck output is
> attached.
>
> Gene
I'm sending this message in two parts because the cygcheck
outputs exceed the server's limit on size for a single message.
As this message indicates, it seems that at one point, openGL
did seem to work properly with openGL . To demonstrate that,
I restored an earlier version of cygwin I had backed up with
which I successfully ran, remotely, a TCL/TK application
that employs openGL. I have attached cygcheck files from
the cygwin setups where openGL functions properly; the
cygcheck output where openGL fails (openGL_malfunctions.txt)
is in the following message. Interestingly, both setups use
the same version of openGL (version 1.1.0-7), but there
are differences elsewhere in the build. Can anyone infer
from these data the reason why TCL/TK bombs with the
more recent cygwin build?
Thanx in advance for your help.
Gene
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