not possible to start two X servers, only the one launched later works

[Zhang Weiwu]

On Sat, 3 Jun 2006, Stefan Dirsch wrote:

> On Sat, Jun 03, 2006 at 10:56:24PM +0800, Zhang Weiwu wrote:
> > Hello. I just posted question about the problem of dual-head cannot
> > initialize the second card. I just managed to make both video card work with
> > two PCI slots (the bug Stefan mensioned also state it is problemaic to work
> > with dual-head with one of the video card is on-board card).
> >
> > Currently both video card can work the same time with one single X server in
> > xinerama style, I can move cursor from this screen to the other one just
> > fine. My original purpose is to run one X server per card so that I can make
> > 'multi-seat' host.
> >
> > I have two sets of keyboard/monitor/mouse attached. starting any of them
> > works fine
> > X -layout seat0 => result, the first set of keyboard/monitor/mouse works
> > X -layout seat1 => result, the first set of keyboard/monitor/mouse works
> >
> > (seat0 is configured to work with a Voodoo Banshee card on the 2nd PCI slot)
> > (seat1 is configured to work with a SiS 300 card on the 1st PCI slot)
> >
> > However, they don't work together. Examples: (KMV = Keyboard/Mouse/Video):
> >
> > ========== Start seat0 first ===========
> > X :0 -layout seat0 => result, the first KMV works
> > X :1 -layout seat1 => result, the second KMV works, the first KMV shows a
> > text cursor (an underline) on the upper-left corner of screen and hang
> > there, the process 'X :0' doesn't quit.
> >
> > ========== Start seat1 first ===========
> > X :0 -layout seat1 => result, the second KMV works
> > X :1 -layout seat0 => result, the first KMV works, the second KMV shows a
> > irregular white band on the middle of the screen, taking up 1/3 of the
> > screen heigh and fill the width, and keep flashing
> >
> > So, is this a novell bug too? (that way I go report it) This time I was
> > using SuSE 10.0 and Xorg 6.8.2. I am happy to do an upgrade if that can
> > solve the problem.
>
> I don't think so. I never tried any multiseat setup, but IIRC you need
> at least the "-sharevts" Xserver option.
>
> Best regards,
> Stefan

Thank you for your help again. I forgot to mension I tried -sharevts but I
removed it because -sharevts creates this error:

Fatal server error:
Unrecognized option: -sharevts

This error happen on both SuSE 10.0 and SuSE 10.1. I also think perhaps
-noswitchvts is important but that creates the same error too:

Fatal server error:
Unrecognized option: -noswitchvts

As you menstioned it I think perhaps this is a SuSE specific problem, thus I
tried to use -sharevts on Ubuntu and this parameter IS RECOGNIZED. So, if
only the SuSE xorg have this problem, do we have a replacement xorg RPM
package?