bugGNU Octave - Bugs: bug #60290, The message "octave: X11...

 
 

bug #60290: The message "octave: X11 DISPLAY environment variable not set" should not be printed on startup

Submitted by:  Lars Kindermann <larskindermann>
Submitted on:  Fri 26 Mar 2021 12:38:59 AM UTC  
 
Category:  Interpreter Severity:  1 - Wish
Priority:  3 - Low Item Group:  Unexpected Error or Warning
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  dev Operating System:  GNU/Linux

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Fri 26 Mar 2021 12:54:45 PM UTC, comment #3: 

In this warning "GUI" means "anything that needs a display", thus including FLTK, not only Qt GUI. Given that there exist at least two very simple options ("-W" or "-q") this seems like a very low priority feature request.

If you consider the requested feature is worth the time spent writing a patch don't hesitate to write one.

Pantxo Diribarne <pantxo>
Project Member
Fri 26 Mar 2021 12:46:01 PM UTC, comment #2: 

But this message appears, even if built without GUI support:

LAR:~ $ octave --gui
octave: GUI features missing or disabled in this build
LAR:~ $

but

LAR:~ $ octave
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features

GNU Octave, version 6.1.0
Copyright (C) 2020 The Octave Project Developers.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.

Octave was configured for "aarch64-unknown-linux-android".

Additional information about Octave is available at https://www.octave.org.

Please contribute if you find this software useful.
For more information, visit https://www.octave.org/get-involved.html

Read https://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type 'news'.

octave:1>

Lars Kindermann <larskindermann>
Fri 26 Mar 2021 08:12:58 AM UTC, comment #1: 

Whatever the way you invoke Octave, you are requesting a GUI feature by default (octave-cli->FLTK for figures, octave->Qt for figures). The "-W" option tells octave to start without a display and the warning is then not displayed.

Pantxo Diribarne <pantxo>
Project Member
Fri 26 Mar 2021 12:38:59 AM UTC, original submission:  

Recently I started to use Octave frequently on headless systems (Raspberry Pi without X11, Termux/Android) with no graphics capabilities. So I am always greeted with the message

octave: X11 DISPLAY environment variable not set
octave: disabling GUI features

I am aware of the -q option which disables this, but wouldn't it be better to throw this warning only when actually requesting a GUI feature? 

Lars Kindermann <larskindermann>

 

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-03-26 pantxo Severity3 - Normal => 1 - Wish
        Priority5 - Normal => 3 - Low

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