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bug#18347: 24.3.93; Incomplete splash screen display on Cygwin-w32 build

From: Ken Brown
Subject: bug#18347: 24.3.93; Incomplete splash screen display on Cygwin-w32 build
Date: Fri, 29 Aug 2014 11:08:21 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 8/29/2014 2:25 AM, Eli Zaretskii wrote:
Date: Thu, 28 Aug 2014 17:51:06 -0400
From: Ken Brown <address@hidden>

--- lisp/startup.el     2014-07-08 09:17:09 +0000
+++ lisp/startup.el     2014-08-28 20:07:20 +0000
@@ -1812,7 +1812,7 @@
     (let (chosen-frame)
       ;; MS-Windows needs this to have a chance to make the initial
       ;; frame visible.
-    (if (eq system-type 'windows-nt)
+    (if (eq window-system 'w32)
          (sit-for 0 t))
       (dolist (frame (append (frame-list) (list (selected-frame))))
         (if (and (frame-visible-p frame)

It is fundamentally wrong to use window-system the variable in such
circumstances (or almost any other).  Please use the function instead.

OK.  But could you explain why?  TIA.

Is this still OK for the native Windows build?  If so, is it OK to
install it in the release branch?

Yes and yes.  Although I'd urge you to try to figure out why this is
needed in the cygwin-w32 build (the native-build problem which led to
this code manifested itself in a rather different way, see bug#16014).

Actually, the visual symptom I'm describing (failure of the logo to appear) is identical to what Juanma reported in that bug. Your message in that bug discussion says, "It's again that timing thing with making the initial frame visible." The "again" suggests that there is an earlier bug report or discussion about that. Can you give me a reference or just explain what you meant by that?


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