secondary screen only works until login

[Dave Stevens]

On Tue, 29 Aug 2017 21:09:59 +0100
Colin Law <clanlaw at gmail.com> wrote:

> >
> > Yes always just look at xrandr I guess.
> >
> > xrandr is a tool you can use to make those changes.  
> 
> Note that for a second user the second display works correctly, so it
> should not be necessary to do anything with xrandr, he needs to find
> out what has got messed up for the original user.
> 
> Dave, when logged in as the second user what does System Settings >
> Displays say about the display?
> 
> Colin

Hi Colin,

We're crossing emails I think. What I did after Xen's reply 
dwas man xrandr and one option was xrandr --auto. I ran that as an
unprivileged user and the second screen immediately lit up. So at that
point I oohed and aaahed and thanked Xen. The I saw your email and shut
everything off and repowered the screen then the laptop. Now the
default login comes up with the secondary screen working. I don't
really understand why but I've got my second screen working. 

When I run System Settings > Displays I get
various stuff. Can I post a screenshot on this list?

D
-- 
In modern fantasy (literary or governmental), killing people is the
usual solution to the so-called war between good and evil. My books are
not conceived in terms of such a war, and offer no simple answers to
simplistic questions.

----- Ursula Le Guin