Re: Slow response to keypresses in xorg-server-1.8.0-1

[Simon Marlow <marlowsd at gmail dot com>]

On 30/06/2010 18:40, Jon TURNEY wrote:

> This is fallout from a change [1] to the way we process Windows messages
> to handle large bursts of them overflowing the Xserver's internal event
> queue.
>
> It seems that sometimes /dev/windows doesn't seem ready to select() even
> when there is still Windows messages to process. I can't quite
> understand how this happens. I don't think this is a bug in cygwin, but
> probably something subtle to do with message ordering and nonqueued
> messages (like WM_ACTIVATE).
>
> Anyhow, I've cooked up a small additional change which should prevent
> this blocking behaviour and uploaded a build [2]. It seems to resolve
> the problem in this specific case. Perhaps you could try it out and see
> if it helps?
>
> [1] http://cygwin.com/ml/cygwin-xfree/2010-02/msg00124.html
> [2] ftp://cygwin.com/pub/cygwinx/XWin.20100630-git-bc2f74e105146c36.exe.bz2

I experienced similar symptoms after upgrading to 1.8 recently, and the 
above XWin binary seems to be doing the trick so far.

I use the VirtuaWin virtual-desktop tool, and found that often when 
switching to a desktop with XWin windows on it, the windows would remain 
blank until I right-clicked on the XWin icon in the tray, when they 
would refresh.

Incidentally even with previous versions of Cygwin/X, VirtuaWin and 
Cygwin/X don't cooperate very well - when I switch from one desktop 
containing X windows to another, I see the content of the previous 
desktop's windows in the new ones (i.e. the windows in the desktop I 
switched to haven't refreshed their content).  I don't know whose fault 
this is, and I realise this isn't a well-characterised bug report, so 
feel free to take it or leave it.

Cheers,
	Simon

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