From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 129655 invoked by alias); 26 Jun 2018 20:33:24 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 129586 invoked by uid 89); 26 Jun 2018 20:33:24 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=william, telling, rendering, William X-HELO: out2-smtp.messagingengine.com Received: from out2-smtp.messagingengine.com (HELO out2-smtp.messagingengine.com) (66.111.4.26) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 26 Jun 2018 20:33:22 +0000 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 153B821C5F; Tue, 26 Jun 2018 16:33:21 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute6.internal (MEProxy); Tue, 26 Jun 2018 16:33:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :reply-to:subject:to:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=D6xI+5ZKd/RaEWN8/aoOGttq8rgsOLKR1geJ1v13aVI=; b=PGlch5AmeX01 gcKtziMNeH9I4eUNmLxW9BmY/KxEEQW66vYyRPkbZccHyPyfDnQ1DczjFJhicg+J KD3sMYRG6pV7jVDtX1CZJz1QF7VPB8CVSRcyZdKKtIVjO6g73hxZII8ZTzzdfVgH nNO0sLOZGHpSuGYFubBY2O1ouilP1XkVl75HFioiJkQGsPOnnste99s8idJ7tXPK +gzqwNqyQv7YHACTqJ5mmH+558T0ovNGsbKYWpcvR1XOg5HBeWCWzySyrewwmRx9 CDwzOr1ReCAO+DlJVVbpdhBeZifp0A/PwNxL2nWjkr6g0tHWFH+AioTbXauqEHUa wX0RLdQG0w== Received: from [192.168.1.102] (host86-162-230-131.range86-162.btcentralplus.com [86.162.230.131]) by mail.messagingengine.com (Postfix) with ESMTPA id 381C4E4626; Tue, 26 Jun 2018 16:33:20 -0400 (EDT) Subject: Re: octave says WGL_ARB_multisample is missing To: The Cygwin Mailing List References: From: Jon Turney Cc: William Mitchell Reply-To: The Cygwin Mailing List Message-ID: <055f7618-d9f5-1071-b789-c21a90880320@dronecode.org.uk> Date: Wed, 27 Jun 2018 06:53:00 -0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-SW-Source: 2018-06/txt/msg00293.txt.bz2 On 26/06/2018 20:27, William Mitchell wrote: > When I run octave on a fresh installation of cygwin64 on a Windows 7 > machine, I get the error: > > libGL error: required WGL extension WGL_ARB_multisample is missing This error is coming from the WGL direct renderer built into libGL on Cygwin, and is telling you that this extension not provided by the Windows display driver you are using. (This is unusual) It's nothing to do with GLEW or any other cygwin libraries. Possible solutions: Install/upgrade the display driver Use software rendering by setting the LIBGL_ALWAYS_SOFTWARE environment variable (See also https://x.cygwin.com/docs/ug/using-glx.html) > Insufficient GL support > error: unable to plot due to insufficient OpenGL support > > octave begins running fine. The error occurs when it encounters a plot > statement. > > I have had this problem with an old installation of cygwin for at least a > year. I finally decided to wipe out cygwin and try a fresh installation. > This installation contains the "minimal" default packages plus Devel: > gcc-core, gcc-gfortran, gcc-g++, gdb, mingw64-x86_64-gcc-core, > mingw64-x86_64-gfortran, mingw64-x86_64-g++; Graphics: gnuplot, > ImageMagick; Math: bc, grace, octave; Shells: tcsh; X11: everything. > > I notice that libGLEW is included in the packages that it installs, which > is where I would expect to find the WGL extensions. This contains > /usr/bin/cygGLEW-2-1.dll, but I don't know how to find out what functions > are in a dll to see if it contains WGL_ARB_multisample. > > Any suggestions on what is wrong with this installation are greatly > appreciated. -- Jon Turney Volunteer Cygwin/X X Server maintainer -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple