Dinamically switch between Xinerama and Multiseat

[Tobias Kaminsky]

On Tuesday 25 November 2008 09:52:27 K�rlis Repsons wrote:
> On Monday 24 November 2008 16:29:12 Tobias Kaminsky wrote:
> > Hello,
> >
> > I have 2 TFTs with each 1280x1024.
> > Normally I work alone on the pc -> Xinerama.
> > But sometimes my girlfriend wants to work on the pc, too. But I do not
> > want to log out, change KDM and log in again.
> >
> > So I need something that works on the fly.
> >
> > Here is what I have this far:
> >
> > 1) Starting X across both TFTs.
> > 2) DISPLAY=:0 Xephyr :1 -br +xinerama -screen 2560x1024
> > This lets me have one big screen where I can load KDM.
> > 3) DISPLAY=:1 xrandr -s 1280x1024 lets me change the size to one TFT.
> >
> > 3.1) Starting another Xephyr on the other TFT with a small Window Manager
> > is no big deal.
> > ----> Two Xephyr, one one each TFT
> >
> > Now "backwards":
> > Closing one Xephyr.
> >
> > 4) DISPLAY=:1 xrandr -s 2560x1024
> > Not a supported mode any longer.
> >
> > This is my problem. Starting Xephyr with 2560x1024 works fine.
> > But after resizing it, the maximum resolution is 1600x1200.
> >
> > Also adding a new modeline does not help as it is accepted for the first
> > time but not being displayed nor possible to select it.
> >
> > Any suggestions would be nice.
>
> Well, maybe you will have to get 3rd display? I am in a similar problematic
> and this looks like best thing to do... Additionally, you won't have to do
> all the movement each time your girlfriend needs a PC. Just an extra
> screen, which will mostly be unused. Choice is yours.
My second is mostly unused because I do not have that many apps that can be
used properly with two screens.
But not using the second one is no solution.
> You can* also start that Xephyr maximised on second screen - Xinerama
> supports it!
What would help this? At the moment I do not see the advantage.
> Should work fine, if your girlfried makes no security threat
> to you :) (in a case when you have to leave your session open)
> * is an indirect conclusion, which has some assumptions
>
> I am currently slowly testing those things, so not many questions I can
> answer, just some ideas.
Just talking about it is always the best way to get new ideas and, maybe, the
best solution.

> Regards

Best regards
Tobi

> > ------
> > xrandr-1.2.3
> > xorg-server-1.5.2
> >
> > Portage 2.2_rc15 (default/linux/amd64/2008.0, gcc-4.3.2,
> > glibc-2.8_p20080602- r0, 2.6.27.6 x86_64)
> > System uname:
> > Linux-2.6.27.6-x86_64-AMD_Phenom-tm-_9850_Quad-Core_Processor-
> > with-glibc2.2.5
> > ------
> >
> > Thanks
> > Tobi
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> > xorg at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/xorg
>
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