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Re: [Xen-devel] beginnings of allowing more than the basic 80x25 VGA scr

To: <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] beginnings of allowing more than the basic 80x25 VGA screen resolution
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Mon, 04 Jul 2005 02:00:29 -0600
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>We could certainly add a way to propagate the mode option through to 
>the vga driver, but is the Linux vga driver really unable to switch 
>modes without bios help? Is there support for a protected-mode
>driver instead?

As far as I know, not only the VGA driver does not do any mode
switching, even the VESA one doesn't (because the protected mode
interface doesn't cover the mode switching functions as far as I
remember). Only the video board specific frame buffer drivers are able
to switch modes, and the bad thing (for me personally) is that even in
2.6.12 there still is no (64-bit) support for the i915 chipset. So I
continue to be required to live with the video mode that XEN 'sets'
prior to loading dom0, and short of it supporting a VESA console my
first minimal attempt was to at least increase (and propagate) the size
to the maximum possible without significant changes.


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