GNU bug report logs - #63555
emacs 29 complains that it can't connect to the display

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Message #46 received at 63555-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 63555-done <at> debbugs.gnu.org, rpluim <at> gmail.com, phill <at> thesusis.net
Subject: Re: bug#63555: emacs 29 complains that it can't connect to the display
Date: Sat, 20 May 2023 15:58:50 +0300

> From: Po Lu <luangruo <at> yahoo.com>
> Cc: rpluim <at> gmail.com,  phill <at> thesusis.net,  63555 <at> debbugs.gnu.org
> Date: Sat, 20 May 2023 16:28:30 +0800
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > What function(s) is/are used at that point which tells us a GUI
> > session is impossible?
> 
> window-system-initialization.
> 
> > Can we invoke those same functions earlier during startup to realize
> > this fact where we still can start as -nw?
> 
> Unfortunately not.  At least, not enough to make a change suitable for
> the release branch.

Too bad.  I added some verbiage to this effect in NEWS, and I'm
closing this bug.

(With all these disadvantages, I wonder why the PGTK build was
considered such a useful addition to Emacs...)

Btw, the Emacs user manual says WAYLAND_DISPLAY is the variable used
by PGTK, which you seem to say is inaccurate?

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