linux-kernel - Re: KMS and vgaconsole

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Message-ID: <20110111111004.693b8e7c@jbarnes-desktop>
Date:	Tue, 11 Jan 2011 11:10:04 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Joshua Hudson <joshudson@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: KMS and vgaconsole

On Mon, 10 Jan 2011 18:41:41 -0800
Joshua Hudson <joshudson@...il.com> wrote:

> Has anyone tried to implement KMS support for vgaconsole.
> 
> Not everybody wants fbcon (I most certainly do not.)

I don't know of anyone working on it.  It was always a distant TODO
when we were first doing the KMS work, and it's theoretically possible
to have VGA text & graphics modes available as part of KMS, but it
would require some big additions to the graphics drivers.  VGA modes
tend to take a lot more power than high res modes too, since they
activate power hungry legacy hardware that is otherwise disabled.

> Also, having it essentially necessary for some environments
> (co-existing with Xserver-xorg-radion) and unusable with others, such
> as VESA in VM is not a very good situation.

Why not?  Machines typically have supported devices or not; if so they
can use all the good stuff, if not, they can use the compatibility code
(like VESA) exclusively.

-- 
Jesse Barnes, Intel Open Source Technology Center
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