Messages in this thread | | | Date | Tue, 11 Mar 2008 00:05:11 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH 6/6] PM/FB/gxfb: add config option that allows disabling of VT switch during suspend |
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On Mon 2008-03-10 14:19:39, Andrew Morton wrote: > On Sat, 8 Mar 2008 20:49:27 -0500 > Andres Salomon <dilinger@queued.net> wrote: > > > This is purely for suspend/resume time optimization. > > > > > > >From 874aa20022a2501a30704163ed31a7baba7de9e5 Mon Sep 17 00:00:00 2001 > > From: Andres Salomon <dilinger@debian.org> > > 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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