Re: Segfault on plot -- insufficient GL support

[Michael Pender]

Good point--it isn't a kernel panic, just an Octave panic.  If anyone else searches this message later and wants to try gnuplot instead of OpenGL, the simplest thing to do is issue the following two statements before opening any plot windows:

close all

graphics_toolkit gnuplot

This solved the problem for now.

On Fri, Feb 28, 2014 at 12:50 PM, Jordi Gutiérrez Hermoso <address@hidden> wrote:

On Fri, 2014-02-28 at 08:39 -0800, mpender wrote:
> I started getting a strange error message today when I try to do a simple
> plot in Octave 3.8.0 under Ubuntu 12.04.3 LTS:
>
> octave:2> plot (tr)
> Xlib:  extension "GLX" missing on display ":0.0".
> Insufficient GL support
> Xlib:  extension "GLX" missing on display ":0.0".
> Insufficient GL support
> panic: Segmentation fault -- stopping myself...
> attempting to save variables to 'octave-workspace'...
> save to 'octave-workspace' complete
> Segmentation fault (core dumped)

The problem is that your graphics card driver doesn't support OpenGL.
You should either install OpenGL support if it exists, or use gnuplot
instead of the default OpenGL plotter. And Octave should do something
more graceful than crashing if OpenGL isn't available.

Also, this isn't a kernel panic. You didn't crash Linux. You just
crashed Octave.

- Jordi G. H.