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Date:	Tue, 21 Jun 2022 19:48:09 +0900 (JST)
From:	Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>,
	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
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	<20220621184441 DOT 3cb63f4b7df9c1f68d114878 AT nifty DOT ne DOT jp>
Subject:	Re: fltk does not work on cygwin version octave-6.4.0
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> From: "Takashi Yano" 
> To: "cygwin>
Cc: "Tatsuro MATSUOKA"
> Date: 2022/06/21 火 18:45
> Subject: Re: fltk does not work on cygwin version octave-6.4.0
 
> On Tue, 21 Jun 2022 14:15:12 +0900 (JST)
> Tatsuro MATSUOKA wrote:
> > fltk does not work on cygwin version octave-6.4.0
> > 
> > octave:1> graphics_toolkit fltk
> > octave:2> plot(1:10);
> > Insufficient GL support
> > error: unable to plot due to insufficient OpenGL support
> > 
> > plot windows flashes and disappear immediately
> 
> I guess it depends on GPU. What GPU do you use?
> It almost works in my environment except for that it needs
> 'Reset Figure' to draw. Without 'Reset figure', the plot area
> is filled gray. My GPU is GeForce GTX 750 Ti.
> 
My machine is very old.
CPU Intel(R) Core(TM) i5 CPU       M 430  @ 2.27GHz   2.27 GHz
GPU Intel(R) HD Graphics

I will try relatively new machine (parchased in 2020.) day after tomorrow.

> Did you try LIBGL_ALWAYS_SOFTWARE=1 ?
I tried it. But the result is the same.

Tatsuro 


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