[Octave-bug-tracker] [bug #52998] Segmentation fault for OpenGL printing of non-visible figures

[Dan Sebald]

Follow-up Comment #5, bug #52998 (project octave):

Yes, it probably is.  I just got confused with debugging, testing versions of
code last night.  I usually use the prefix 

LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGL.so

these days for building, but don't always when testing.

However, this prefix doesn't lead to complete success.  FLTK appears to run
fine, but Qt has problems:


octave:1> graphics_toolkit fltk
octave:2> set(gcf, 'visible', 'off')
octave:3> plot(1:50)
octave:4> print junk.pdf
octave:5> exit



octave:1> graphics_toolkit qt
octave:2> set(gcf, 'visible', 'off')
octave:3> plot(1:50)
octave:4> print junk.pdf
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
octave:5> exit

[process is hung right here and won't come back to command line]


So, I can't get this to work either way for Qt.  I'm going to test the
changeset attached here

https://savannah.gnu.org/bugs/?52940#comment40

this evening for how well the output looks and see if that gets around the
Nvidia hardware/driver issue.

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