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Re: [64bit] Problem with emacs and shared memory under X11
- From: Jon TURNEY <jon dot turney at dronecode dot org dot uk>
- To: cygwin-apps at cygwin dot com
- Cc: kbrown at cornell dot edu
- Date: Sat, 06 Jul 2013 15:28:34 +0100
- Subject: Re: [64bit] Problem with emacs and shared memory under X11
- References: <51D803A0 dot 7090700 at cornell dot edu>
On 06/07/2013 12:46, Ken Brown wrote:
> On 64bit Cygwin, if I try to run emacs under X11 while cygserver is running,
> emacs fails to connect to the X server. The error message from the X server is
> BadShmSeg (invalid shared segment parameter) on protocol request 131
> To reproduce:
> 1. Install the current version of emacs-X11 (24.3-4).
> 2. Start the (64bit) cygserver service.
> 3. Start the (64bit) X server, e.g., by typing "startxwin" in a Cygwin Terminal.
> 4. In the resulting xterm, try to start emacs:
> $ emacs-X11.exe -Q &
> The result is that emacs displays the error message above and then aborts.
> emacs-X11 works fine if the X server is started when cygserver is not running.
Yup, there's some kind of bug which affects SHM use by the X server on 64bit.
I am looking into it.
You can also work around this by starting the X server with '-extension MIT-SHM'
Volunteer Cygwin/X X Server maintainer