why does -sharevts is so important for multseat setup?

[StompDagger1@yahoo.com]

From: Alexandre CONFIANT-LATOUR <alex at user-unfriendly.net>

To: "StompDagger1 at yahoo.com" <stompdagger1 at yahoo.com> 
Cc: "xorg at lists.x.org" <xorg at lists.x.org> 
Sent: Monday, August 20, 2012 12:01 PM
Subject: Re: why does -sharevts is so important for multseat setup?
 
On 20/08/2012 10:40, StompDagger1 at yahoo.com wrote:
> why would multiple X instances to share the same /dev/ttyx? what is the
> gain in that?

I'm working in the desktop virtualization field and, in my case, it allowed me to start a lot of X.org instances on the same server without running out of tty.

I see, still why not increase the number in the kernel?
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