bugGNU Octave - Bugs: bug #32184, fltk backend: crash in dual...

 
 

bug #32184: fltk backend: crash in dual graphics card notebook

Submitter:  Petr Mikulik <mikulik>
Submitted:  Wed 19 Jan 2011 10:32:02 PM UTC
   
 
Category:  Plotting with OpenGL Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  * Closed
Release:  * dev Operating System:  * GNU/Linux
Fixed Release:  None Planned Release:  None
* Mandatory Fields

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Wed 16 Mar 2011 05:36:23 PM UTC, comment #1: 

The code uses OpenGL so your X server will need that option.  The exact details will vary between Linux distributions.  By way of encouragement, I was recently able to do it using Kubuntu 10.04 on a laptop with Intel and Nvidia cards. 

This is not an Octave issue per se so I am closing this report.

Rik <rik5>
Group administrator
Wed 19 Jan 2011 10:32:02 PM UTC, original submission:  

There are notebooks with dual graphics card, typically Intel (low energy consumption) and Nvidia or ATI (high performance). I have compiled Octave on a notebook with switchable Nvidia card. Octave runs well with Nvidia on, but if I restart notebook with Intel on and Nvidia off, then Octave crashes after trying to plot with fltk:


> backend fltk
> plot(1:10)
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...
Neoprávněný přístup do paměti (SIGSEGV)


Trying to get info about OpenGL:

$ glxgears
Xlib:  extension "GLX" missing on display ":0.0".
glxgears: Error: couldn't get an RGB, Double-buffered visual.

$ glxinfo
name of display: :0.0
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Error: couldn't find RGB GLX visual
...


What to do with Octave+fltk in this case? Does fltk work only on OpenGL hardware?

Petr Mikulik <mikulik>

 

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2011-03-16 rik5 Open/ClosedOpen Closed

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