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Date: Fri, 14 Aug 2009 16:44:42 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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Subject: Re: [ANNOUNCEMENT] Updated: run-1.1.11-1
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On Aug 14 10:15, Charles Wilson wrote:
> Corinna Vinschen wrote:
> 
> > Oh, ok, sorry about that.  I didn't realize there's a urxvt-X and a
> > urxvtc-X, and accidentally grabbed urxvtc-X when creating the shortcut.
> > 
> > And yes, it's like you expected.  When starting on W7 without run, a
> > command window briefly pops up and disappears again.  The CPU usage is
> > low, afterwards.
> 
> Thanks.
> 
> OK, then here's how I'm going to "solve" the problem. I will modify run
> so that instead of using the "new" code on WinXP+ incl. W7, it will only
> use the "new" code on W7.  That way, things will continue to work as
> they did in run-1.1.10 for existing OS's.  This should also "solve" Ken
> Brown's problem with run -> batch file -> bash(.dotfiles) -> emacs.exe
> leading to poor performance -- at least until he upgrades to W7.
> 
> For W7, "don't do that" -- don't launch urxvt-X (standalone) or urxvtd-X
>   (daemon) using run, at all. Instead, rely on urxvt[d]-X's own code to
> hide the console window.  The downside of this is a brief flicker.
> 
> Now, you CAN use 'run' on W7 in conjunction with urxvtc-X (client), with
> no ill effects AFAICT.  So, if you use the client/daemon urxvt, you get
> only ONE flicker when you first launch the daemon (perhaps thru
> .Xsession), and after that everything is fine.
> 
> I'll also update the documentation to reflect this limitation.
> 
> Later, when W7 in is more widespread use (e.g. when I have personal
> access to it), I'll see if I can improve the situation a bit. Maybe I'll
> add a switch "-f/--flicker-ok" to enable use of a mechanism similar to
> urxvt[d]-X's hide_console() [only, without the 'check to see if this
> console already existed before I was launched' intelligence] rather than
> cygwin's CREATE_NO_WINDOW, just for situations like urxvt[d]-X and Ken's
> emacs example.

I just tested this further.  If you omit the CREATE_NO_WINDOW flag
to CreateProcess, the console window still flickers when starting
urxvt, but the CPU usage does not stick to 100%.  Since XWin and
xterm are apparently unaffected by this (no flickering cmd window)
it looks like that's the better interim solution.

Sorry about that.  The CREATE_NO_WINDOW flag looked like a good idea 
at the time(*)


Corinna


(*) Famous last words


-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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