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Date:	Mon, 02 Dec 2013 14:36:58 +0100
From:	Markus Hoenicka <markus DOT hoenicka AT mhoenicka DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: emacs-x11: new clipboard size =?UTF-8?Q?limitation=3F?=
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Around 2013-12-02 14:11, Jon TURNEY was heard to say:
> On 02/12/2013 12:13, Markus Hoenicka wrote:
>> I'm running emacs-x11 24.3.1 on
>> 
>> CYGWIN_NT-5.1 sbhc123 1.7.25(0.270/5/3) 2013-08-31 20:39 i686 Cygwin
>> 
>> I used to be able to copy text from Emacs to Windows applications 
>> through the
>> clipboard without practical size limitations. However, since my last 
>> Cygwin
>> upgrade (which updated both Emacs and cygwin1.dll to the versions 
>> mentioned
>> above) the clipboard seems to be limited in size. All I do is the 
>> following:
>> 
>> - open a file containing ASCII text, amounting to like three printed 
>> pages of
>> text
>> - at the beginning of the buffer, press Ctrl-Space
>> - at the end of the buffer, press M-w
>> - switch to a Windows application (any that can handle unformatted 
>> text will
>> do, use e.g. LibreOffice Writer)
>> - insert the text using Ctrl-v
>> 
>> stderr shows the following messages:
>> 
>> winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY_DATA
>> winClipboardFlushXEvents - SelectionNotify - X*TextPropertyToTextList
>> returned: XConverterNotFound
>> winClipboardWindowProc - timed out waiting for 
>> WIN_XEVENTS_NOTIFY_TARGETS
>> 
>> On the receiving end, the message reads something like:
>> 
>> "Clipboard does not contain specified formatted data"
>> 
>> Trial and error tells me that I can copy 6104 characters without 
>> problems.
>> Trying to copy 6105 or more characters triggers the error. I'll try 
>> and see if
>> this number is constant across reboots. Copying within Emacs, i.e. by 
>> yanking
>> the text into a different buffer, is not affected. The problem 
>> persists if I
>> start Emacs using the -q flag.
> 
> This looks like the same issue as reported in [1], so you might like to 
> try
> the snapshot from [2] and see if it improves things for you?
> 
> What you write does seem to support the theory that this is a 
> regression in
> select() in the cygwin DLL.  It might be useful if you could say what 
> version
> of the cygwin DLL you had when it was working correctly before you 
> upgraded.
> 
> [1] http://cygwin.com/ml/cygwin-xfree/2013-10/msg00031.html
> [2] http://cygwin.com/ml/cygwin-xfree/2013-11/msg00012.html

Hi,

thanks for your quick reply. Yes, the XWin.exe snapshot seems to fix the 
problem for me. I tried a few copy+paste cycles with the amount of text 
that I usually shuffle around, and there were no errors or warnings.

As for the Cygwin DLL version before upgrading, I can only guess. I 
update only when need arises, so it may well have been 6 months or so 
since the last update. I'm sorry that I can't be more specific here.

regards,
Markus

-- 
Markus Hoenicka
http://www.mhoenicka.de
AQ score 38


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