Bug 837824 - FTLK backend not working in EL6
FTLK backend not working in EL6
Product: Fedora EPEL
Classification: Fedora
Component: octave (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Susi Lehtola
Fedora Extras Quality Assurance
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Reported: 2012-07-05 08:47 EDT by Susi Lehtola
Modified: 2012-09-26 07:05 EDT (History)
3 users (show)

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Last Closed: 2012-09-26 07:05:43 EDT
Type: Bug
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Description Susi Lehtola 2012-07-05 08:47:52 EDT
Related to the F17 issue with missing buildrequires, I checked the fltk backend in el6. The mesa libraries are in the buildroot, and the fltk backend gets compiled.

However, when I tried to use the backend on a centos6 machine over ssh, I got a segfault:

octave:1> graphics_toolkit("fltk")
octave:2> x=0:.1:2*pi;
octave:3> plot(x,sin(x))
Insufficient GL support
Insufficient GL support

Program received signal SIGSEGV, Segmentation fault.
Fl_Gl_Window::make_current (this=0x2ea34d0) at Fl_Gl_Window.cxx:146
146	    context_ = fl_create_gl_context(this, g);

I'm guessing the GL libraries are too old in EL6, so maybe the fltk support should be disabled in EL6.
Comment 1 Rex Dieter 2012-07-05 09:11:49 EDT
1.  that error comes from fltk indeed
2.  I think it's because your X *server* requires working gl support (ie, the box you're ssh'ing *from*).
Comment 2 Rex Dieter 2012-07-05 09:14:13 EDT
Fwiw, it works for me ok, ssh'ing from an oldish f14 box (with known-working opengl) to a el6 box with octave, and running those commands you typed.
Comment 3 Susi Lehtola 2012-09-26 07:05:43 EDT
Well, as it works for you then closing.

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