[Assist] No protocol specified Cant connect to display: :0

[Freemor]

That isn't much to go on but it sounds like a xhosts problem (because you
mention it happens when you disconnect the wired internet)

It is probably a symptom on not having set your hostname and hosts files up
correctly.

Basically, If those are misconfigured a situation can arise  where X11 thinks
you are a remote machine and denies access to the X11 display.

Make sure you have a hostname set
Make sure there is an entry fir that name in /etc/hosts linking the name to 
localhost i.e.:

127.0.0.1	yourHostName
::1		yourHostName

and the like.

Also check that DHCP is not setting a hostname somehow.


On Thu, Oct 18, 2018 at 12:21:54AM +0000, edgar at openmail.cc wrote:
> Hello,
> 
> I would like to know if someone can help me with this issue, please.
> 
> Every time that I disconnect (wired connection), I get this:
> $ lxpanelctl run
> No protocol specified
> Cant connect to display: :0
> 
> The same message shows up for other applications.
> 
> I created a bug report https://labs.parabola.nu/issues/2039#note-1
> but I can understand that people are busy with other more relevant
> stuff.
> 
> I would appreciate your help, because it is really annoying! :) Thanks.
> 
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