linux-kernel - Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86

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Message-ID: <20100408001935.GM29192@hexapodia.org>
Date:	Wed, 7 Apr 2010 17:19:35 -0700
From:	Andy Isaacson <adi@...apodia.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Yinghai <yinghai.lu@...cle.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-pci@...r.kernel.org,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	Thomas Renninger <trenn@...e.de>
Subject: Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well
	as x86_32

On Wed, Apr 07, 2010 at 04:43:44PM -0700, H. Peter Anvin wrote:
> > or you can add
> > boot_params.screen_info.orig_video_isVGA == 1
> > or double check scan pci tree to see if video is there or not
> 
> Perhaps boot_params.screen_info.orig_video_isVGA != 1 because he's not
> booting in a text mode?

It's a pretty standard grub2 install (Debian unstable,
1.98~20100128-1.2) with something approaching the default config.  Grub
does seem to put the console in some annoying framebuffer format to draw
the boot menu, but IIRC it switches back to VGA textmode before booting
the kernel.

-andy
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