# Re: PM/FB/gxfb: add config option that allows disabling of VT switch during suspend

- From: Pavel Machek \<hidden\>
- Date: 2008-03-10 23:05:45 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2008/03/1073104
- Thread: https://ratatoskr.run/lkml/2008/03/1072525/t.md

```text
Hi!

> > > > If so, that means extra #ifdef's sprinkled throughout the code.  Note
> > > > that most framebuffer drivers won't be supporting this, and those that
> > > > do will almost certainly always want vt switching turned off..
> > > > 
> > > 
> > > I don't think you need any ifdefs or config options at all, do you?  Just
> > > add a new module parameter to this driver and some little interface into
> > > the PM core which allows the driver to set no_vt_switch?
> > > 
> > 
> > That's a possibility, but doesn't adding hooks into PM core for two
> > drivers (lxfb and gxfb) seems like overkill?  I also don't really see
> > anyone needing to switch back and forth between VT_SWITCH and
> > NO_VT_SWITCH other than to work around possible bugs in the register
> > save/restore code..
> 
> I like Andrew's idea.  I wager This won't be Geode specific for long.
> Either other drivers will get the hint and add real save/restore code
> or the GPU subystem code being worked on by the X folks will come along
> and make the VT switch obsolete for everybody.  Either way, I see hooks
> in the PM core as generic love that everybody can benefit from.

Exactly. We'd like _all_ drivers to behave like this.
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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