[Octave-bug-tracker] [bug #56570] GNU Octave unable to plot on Raspberry Pi 4 (4GB, Buster)

[Keith]

URL:
  <https://savannah.gnu.org/bugs/?56570>

                 Summary: GNU Octave unable to plot on Raspberry Pi 4 (4GB,
Buster)
                 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

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Details:

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
init_gl_context
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

Keith




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