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[Octave-bug-tracker] [bug #56570] GNU Octave unable to plot on Raspberry

From: Keith
Subject: [Octave-bug-tracker] [bug #56570] GNU Octave unable to plot on Raspberry Pi 4 (4GB, Buster)
Date: Mon, 1 Jul 2019 10:19:19 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36


                 Summary: GNU Octave unable to plot on Raspberry Pi 4 (4GB,
                 Project: GNU Octave
            Submitted by: keithdalby
            Submitted on: Mon 01 Jul 2019 02:19:17 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Keith
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: other
        Operating System: GNU/Linux



On a fresh install of Raspbian Buster (from NOOBS 3.1.1) on a Raspberry Pi 4
(4GB), I used...

sudo apt-get install octave

... to install GNU Octave. Octave opened fine. I then typed the following
lines to test it:

t = 0:0.01:2*pi;
x = cos(t);
plot (t, x);

Alas, I saw no plot. Instead, I was presented with the following message:

warning: opengl_renderer: Error 'invalid enumerant' (1280) occurred in
warning: called from
   ancestor at line 64 column 9
   axes at line 68 column 7
   newplot at line 158 column 10
   plot at line 222 column 9

The message goes on like that. A white plot window appears with no interface
at all, no 'close window' buttons, no minimise buttons, just a white window.
It can be closed via the taskbar. Whenever I click in the window, it just
produces more warnings.

I could not see this reported here already, so I thought I would ask in case
anyone can see what dopey mistake I have made. I was unable to do a "sudo
apt-get update" before trying to install the package because Buster is not
live yet, ostensibly I have to wait for a few more days yet.

With kindness



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