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Subject:	Re: Query about "libGL error: Screen is not Windows-DRI capable"
References:	<9e3c9bb3-78b9-dd58-5f39-76b21177b158 AT cs DOT umass DOT edu>
Cc:	moss AT cs DOT umass DOT edu
To:	cygwin AT cygwin DOT com
From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Message-ID:	<9a1e8b03-2824-7308-a66e-8ead1bd15674@dronecode.org.uk>
Date:	Mon, 20 Feb 2017 15:47:56 +0000
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1
MIME-Version:	1.0
In-Reply-To:	<9e3c9bb3-78b9-dd58-5f39-76b21177b158@cs.umass.edu>

On 18/02/2017 21:59, Eliot Moss wrote:
> Dear friends -- I get the message above when I start cygwin emacs-X11
> 32-bit while running Cygwin-X.  First of all, should I care?  And if

No.

This message should probably be downgraded from an error.

> I should, what can I do about it?  Does this have to do with the
> command line parameters when starting the X server, for example?

This message indicates that we wanted to use direct, 
hardware-accelerated OpenGL ('Windows-DRI'), but that the server didn't 
allow it.

This could be due to:
- server option -nowgl
- windowing mode doesn't permit wgl (i.e. not -multiwindow)
- display driver does not support WGL (i.e. the default VGA driver)
etc.

See also [1] for more details.

[1] https://x.cygwin.com/docs/ug/using-glx.html

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