Thorsten Wilms <t_w_@freenet.de> writes:

> On 26.03.2018 11:33, Marius Bakke wrote:
>> It could be done with a "profile hook" in (guix profiles).  Although for
>> the common case I suppose this will be done by a display manager?
>
> But then all X11-supporting display managers would have to care about it.
>
> According to answers in
> https://unix.stackexchange.com/questions/196677/what-is-tmp-x11-unix
> /tmp/.X11-unix/ is the directory where any X11 server will create the 
> unix domain socket X0.
>
> One answer implies that is not necessarily the only way an X11 server 
> may communicate with clients on the same machine.
>
> `/gnu/store: grep -iRs X11-unix` only showed results caused by my own 
> simple-service, matches in binary files and a comment in a 
> slim-sigusr1.patch:
> "The problem was that SLiM doesn't pay attention to SIGUSR1.  So in 
> practice, if X starts slowly, then SLiM gets ECONNREFUSED a couple of 
> time on /tmp/.X11-unix/X0, then goes on trying to connect to 
> localhost:6000, where nobody answers; eventually, it times out and tries 
> again on /tmp/.X11-unix/X0, and finally it shows up on the screen."
>
> I would think that something must already take care of /tmp/.X11-unix/ 
> for an operating-system configuration using plain X11?

Interesting.  I assumed SLiM created it, but could not find it with
'grep'.  Maybe libx11?

In any case it should be safe to add an activation script that creates
/tmp/.X11-unix on GuixSD.  I think it can be part of %desktop-services,
or maybe even %base-services.  Would you like to try it?