On Mon 2008-03-10 14:19:39, Andrew Morton wrote:
On Sat, 8 Mar 2008 20:49:27 -0500
Andres Salomon [off-list ref] wrote:
quoted
This is purely for suspend/resume time optimization.
quoted
From 874aa20022a2501a30704163ed31a7baba7de9e5 Mon Sep 17 00:00:00 2001
From: Andres Salomon <redacted>
Date: Wed, 5 Mar 2008 16:40:25 -0500
Subject: [PATCH] PM: add config option that allows disabling of VT switch during suspend
Prior to suspend, we allocate and switch to a new VT; after suspend, we
switch back to the original VT. This can be slow, and is completely
unnecessary if the framebuffer we're using can restore video properly.
This adds CONFIG_DISABLE_SUSPEND_VT_SWITCH which allows the user to
select whether or not to do that switch. This has been tested with the
gxfb driver (on a Geode GX dev board and OLPC prototype machines). In
order for the user to even see this option, a framebuffer has to declare
support for it (via CONFIG_FBDEV_SUPPORTS_NOSWITCH).
...
It would be far preferable to do this via a kernel boot parameter rather
than via a kernel rebuild.
Actually, it would be better to get this right automatically, without
any config options.
And no, this is not only gxfb/lxfb. At least Sharp Zaurus and FIC
neo1973 can suspend without switching consoles...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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