In Xmaxima (5.9.3cvs / GCL 2.6.7, SBCL 0.9.9, Clisp
2.34 / Linux, and *maybe* also 5.9.3 / GCL 2.6.7 / Win
XP), Gnuplot dumb terminal output is not captured.
plot2d (sin(x), [x, 0, %pi], [gnuplot_term, dumb]);
shows nothing in Xmaxima, and on Linux at least, the
xterm from which Xmaxima was launched shows the output.
Running Maxima from an xterm shows the dumb terminal
output in the xterm as expected (an ascii art sine wave).
Dunno for sure if this same problem is exhibited by
Xmaxima 5.9.3 / GCL 2.6.7 / Win XP. The dumb terminal
output goes missing, but I don't know if that is the
same bug or a different one, because dumb terminal
output is lost in a Maxima command prompt window.
Fixing the gnuplot dumb terminal output is no pressing
problem, but I'm pretty sure that the problem is that
gnuplot is writing an output stream which is not
redirected by Xmaxima; that seems like a somewhat more