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Date:      Fri, 2 Mar 2012 11:47:10 +0200
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Doug Barton <dougb@freebsd.org>
Cc:        Baptiste Daroussin <bapt@freebsd.org>, Ade Lovett <ade@freebsd.org>, freebsd-ports@freebsd.org
Subject:   Re: Fix nvidia-like ports, help needed
Message-ID:  <20120302094710.GD75778@deviant.kiev.zoral.com.ua>
In-Reply-To: <4F509414.3070605@FreeBSD.org>
References:  <20120223072132.GB88092@azathoth.lan> <20120223093421.Horde.oN2FMZjmRSRPRfoNKQ4BA-g@webmail.leidinger.net> <d0ee88b5486535475f0c1c4bf5ecea55@etoilebsd.net> <20294.39398.620930.217619@gromit.timing.com> <20120223211406.GA14803@azathoth.lan> <4F46D751.2090100@FreeBSD.org> <20120228211513.GD99283@azathoth.lan> <4F4D44F0.9060901@FreeBSD.org> <20120228223656.GF99283@azathoth.lan> <4F509414.3070605@FreeBSD.org>

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On Fri, Mar 02, 2012 at 01:34:12AM -0800, Doug Barton wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>=20
> On 02/28/2012 14:36, Baptiste Daroussin wrote:
> > On Tue, Feb 28, 2012 at 01:19:44PM -0800, Doug Barton wrote:
> >> On 2/28/2012 1:15 PM, Baptiste Daroussin wrote:
> >>> Here is a patch to add support for includedir keyword to
> >>> libmap.conf so that we
> >>=20
> >> I think this is overly complicated, and not generally useful. It
> >> also delays the utility of the solution until this gets into the
> >> base.
> >>=20
> >> What I would do instead is to incorporate an nvidia option into
> >> the xorg meta-port, and separate the GL libs into a separate
> >> port. If the nvidia option is checked the GL libs come from an
> >> nvidia slave port. If not, they come from an xorg-server slave
> >> port.
> >>=20
> >> Or, we just keep doing what we're doing now, since it works. I'm
> >> still not sure what problem we're trying to solve. :)
> >>=20
> >>=20
> >> Doug
> >=20
> > the problem we are trying to solve is to avoid having the nvidia
> > drivers overwritting libGL.so.1 which break the package database
> > consistency.
>=20
> In that case the solution I outlined above would work, and it's hard
> for me to see why it wouldn't be the best solution.
There are hybrid machines which have both Intel and NVidia GPUs.
Depending on a switch position, you may activate one of the GPU.
Usually, on-CPU GPU gives power efficiency, while discrete one provdes
a performance.

For such machines, it is _very_ useful to have both libGL.so.1 installed
and somehow switched around. It would be best to have Mesa and NVidia
libGL.so.1 installed under other names, like libGL-mesa.so.1. and
ligGL-nvidia.so.1, and provide a symlink for libGL.so.1

BTW, besides libGL.so.1, another conflicting file is
/usr/local/lib/xorg/modules/extensions/libglx.so.

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