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Subject:	Re: octave says WGL_ARB_multisample is missing
To:	The Cygwin Mailing List <cygwin AT cygwin DOT com>
References:	<CAL_Y+kzuDhMkibJ8mD0RkidG=kXbg0_5bV6wwq0Xuy5UgQeefg AT mail DOT gmail DOT com> <055f7618-d9f5-1071-b789-c21a90880320 AT dronecode DOT org DOT uk> <CAL_Y+kx1XxT8k+aKm0YgoFLTSNfETcy6X06vhu965dKVCBwRsA AT mail DOT gmail DOT com> <e7b2a06e-8f33-1962-1b01-14f25d39dabc AT dronecode DOT org DOT uk> <CAL_Y+kxu4a1dUaZas7xQGrd0svwG1zaPDe27VUZ1TMKuL8JpGg AT mail DOT gmail DOT com>
Cc:	William Mitchell <wfmacmd AT gmail DOT com>
Reply-To:	The Cygwin Mailing List <cygwin AT cygwin DOT com>
From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Message-ID:	<4957aa65-1571-1f12-9ff4-ecb63bb03ea5@dronecode.org.uk>
Date:	Mon, 2 Jul 2018 18:13:44 +0100
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In-Reply-To:	<CAL_Y+kxu4a1dUaZas7xQGrd0svwG1zaPDe27VUZ1TMKuL8JpGg@mail.gmail.com>

On 02/07/2018 13:48, William Mitchell wrote:
> prompt> glxinfo
> name of display: localhost:0.0
> libGL error: required WGL extension WGL_ARB_multisample is missing
> libGL error: required WGL extension WGL_ARB_multisample is missing
> Error: couldn't find RGB GLX visual or fbconfig

Thanks.  This is interesting.

It seems that your graphics card doesn't support WGL_ARB_multisample, 
but does support WGL_ARB_framebuffer_sRGB, which seems a bit unusual.

I've built an libGL1 with a change to handle this situation better [1]

If you download that, chmod +x it, and replace /usr/bin/cygGL-1.dll with 
it (keep a copy of the existing version), you can try 'glxinfo' and 
plotting with octave, to see if it improves things.

[1] ftp://cygwin.com/pub/cygwinx/x86_64/cygGL-1.dll

-- 
Jon Turney
Volunteer Cygwin/X X Server maintainer

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