GNU bug report logs - #31987
[cygwin] libGL error: required WGL extension WGL_ARB_multisample is missing

Previous Next

Full log

View this message in rfc822 format

From: Eli Zaretskii <eliz <at> gnu.org>
To: Achim Gratz <Stromeko <at> nexgo.de>
Cc: 31987 <at> debbugs.gnu.org
Subject: bug#31987: libGL error
Date: Sun, 23 Aug 2020 12:10:13 +0300

> From: Achim Gratz <Stromeko <at> nexgo.de>
> Date: Sun, 23 Aug 2020 09:46:33 +0200
> 
> Stefan Kangas writes:
> >>> Get the following error message when starting emacs:
> >>> libGL error: required WGL extension WGL_ARB_multisample is missing
> >>
> >> Searching for that message finds this:
> >>
> >>   https://www.mail-archive.com/cygwin <at> cygwin.com/msg157465.html
> >
> > So is this worth adding to PROBLEMS or is it notabug?
> 
> It's a problem with certain (Windows) video card drivers that implement
> only a subset of some optional GL API bundles.  In this particular case
> libGL checked for some specific feature and was assuming the existence
> of another from the same API bundle that the driver then didn't actually
> provide, that detection has since been fixed to check all features
> separately AFAIK.  As said in the message linked to, you can always use
> software rendering as a fallback.

Thanks.

So you think it would be good to have this in PROBLEMS?

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.