What determines {default} location of :0, :1 & :2?

[Matthew Monaco]

On 07/07/2013 10:46 AM, Felix Miata wrote:
> On 2013-07-07 18:02 (GMT+0200) Samuel Thibault composed:
> 
>> Felix Miata composed:
> 
>>> IOW, what does one need to do to ensure ttys
>>> 1-6 are not usurped by any X session, and that :0 goes to tty7, :1 to tty 8,
>>> and :2 to tty9?
> 
>> Simply make sure to specify the vt when starting the server:
> 
>> vtXX                   use the specified VT number
> 
> The question you answered I worded poorly. $SUBJECT (as modified by single word
> addition) is the important question. I really don't care which of :0, :1 or :2
> go on vt7, vt8 or vt9. I only care that the first session started, whether by
> KDM or not, go on vt7; that the second, whether that be :0 or :1 or :2, go on
> vt8, and that the third, whether :0 or :1 or :2, go on vt9. I don't want to have
> to think about whether I'm starting a first or later session to which vt it
> should be directed. That used to be automatic, and still should be able to be,
> beginning on vt7, if only one can know what can configure it to be as it was.

It depends on your Display Manager. For LightDM, there is a simple config option
for this.