bugGNU Octave - Bugs: bug #41714, Imagesc causes bus error when...

 
 

bug #41714: Imagesc causes bus error when drawing large images

Submitted by:  Arun Giridhar <arungiridhar>
Submitted on:  Wed 26 Feb 2014 08:25:10 PM UTC  
 
Category: Plotting with OpenGLSeverity: 3 - Normal
Priority: 5 - NormalItem Group: None
Status: DuplicateAssigned to: None
Originator Name: Open/Closed: Closed
Release: devOperating System: GNU/Linux

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Thu 06 Mar 2014 05:36:14 PM UTC, comment #4:

Sorry for the delay in responding. Work kept me away for a while.

There is no error with any graphics toolkit when I use "export QT_ACCESSIBILITY=0" before invoking Octave. Thanks for the workaround. This bug report can be merged with Bug #41552

Arun Giridhar <arungiridhar>
Sun 02 Mar 2014 06:15:43 PM UTC, comment #3:

Arun, could you try the work-around that Felipe suggested and see if the Accessibility API is the source of the problem.

Rik <rik5>
Project Administrator
Thu 27 Feb 2014 02:06:23 AM UTC, comment #2:

we've seen bus errors in bug #41552.

can you try this before starting Octave:

export QT_ACCESSIBILITY=0

or else

sudo apt-get remove --purge qt-at-spi

just to isolate the problem.

thanks.

Felipe G. Nievinski <fgnievinski>
Wed 26 Feb 2014 08:38:18 PM UTC, comment #1:

Additional data: Bus error happens with FLTK as well.

Bus error DOES NOT happen with gnuplot.

Starting Octave in GUI mode versus with "--no-gui" makes no difference for FLTK and gnuplot (Qt is unavailable with --no-gui).

Arun Giridhar <arungiridhar>
Wed 26 Feb 2014 08:25:10 PM UTC, original submission:

Octave exits with a bus error (signal 7) when one passes a large matrix to imagesc. This is using the Qt graphics toolkit on 64-bit Ubuntu 12.04. Using surf on the same large matrix works OK.

Arun Giridhar <arungiridhar>

 

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    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 09 Mar 2014 05:18:01 PM UTCrik5StatusNeed Info=>Duplicate
      Open/ClosedOpen=>Closed
    Sun 02 Mar 2014 06:15:43 PM UTCrik5CategoryPlotting=>Plotting with OpenGL
      StatusNone=>Need Info
    Thu 27 Feb 2014 05:59:19 PM UTCrik5Dependencies-=>Depends on bugs #41552

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