bug#57468: 29.0.50; Text cursor continues to blink when frame loses focus

[Bob Rogers <rogers@rgrjr.com>]

   From: Lars Ingebrigtsen <larsi@gnus.org>
   Date: Mon, 29 Aug 2022 17:21:15 +0200

   Bob Rogers <rogers@rgrjr.com> writes:

   >    I have a number of independent emacs sessions, each with a single GUI
   > frame, some remote via SSH and some as root.  In the sessions using
   > emacs built recently from master with blink-cursor-mode enabled, the
   > cursor continues to blink even when the (single) frame loses focus, when
   > it should become a steady hollow box.  This also happens in "emacs -Q"
   > (somewhat intermittently, along with failure to start blinking, and some
   > stranger things).

   I'm unable to reproduce this, and it doesn't fail to start blinking,
   either.

I was afraid of that.

   > In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.31, cairo version 1.16.0)
   >  of 2022-08-20 built on orion
   > Repository revision: 7e9d744033f07286c21f092f8ea3646a51e37a19
   > Repository branch: rgr-smtpmail-env-from
   > Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
   > System Description: openSUSE Leap 15.4

   This doesn't really say which Emacs repo version you're using --
   7e9d744033f07286c21f092f8ea3646a51e37a19 isn't an Emacs git hash.

Oops; that's for a local branch that just hacks lisp/mail/smtpmail.el.
It's based on 07c04da01016cd81e064a06b2449892eff7c8da0 on master.

   Could you try using the current version from the Emacs repo to see if
   you see the problem there?

Still happens, commit 9f692bcd84e2b6e450e154361e1058186e6481a8.

   FWIW, chromium also has a cursor that blinks if you click on page
elements, but stops when chromium loses focus.

					-- Bob