bug#67628: Emacs 29.1: (x-open-connection (getenv "DISPLAY")) gets "Display :0.0 does not exist" error

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> Or why would the dynamic-setting machinery call get-device-terminal
> for a display that has no frames?

Because events are sent when configuration changes take place on each
display, rather than on each frame.  Although there aren't any frames, a
configuration change is detected and duly reported, after which the
dynamic-setting command bound to the event generated is called, and...