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Date: Fri, 21 Mar 2014 12:12:58 +0100
From: Marco Atzeri <marco.atzeri@gmail.com>
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To: cygwin@cygwin.com
Subject: Re: Does shared memory support work on cyg64?
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On 21/03/2014 11:18, Linda Walsh wrote:
> When I run the Xwin server, it says shared memory isn't available.
>
> I thought running the cygserver took care of this?
>
> Does this not work on cyg64?
>
> Besides the Xwin server, When I try initialize pulseaudio, it
> tries to use shared memory as well, but fails to load (no reason
> why -- just fails)... tried setting --log-level==debug, but
> couldn't find the output anywhere...(nothing in var/log...)
>
>
> I have it running as system:
>       UID     PID    PPID  TTY        STIME COMMAND
> ...
>    SYSTEM    8996    7516 ?        01:54:27 /usr/bin/dbus-daemon
> Bliss\la    1184    7632 cons1    02:53:19 /usr/bin/ps
> Bliss\la    3004       1 cons2    01:44:31 /usr/bin/bash
>    SYSTEM    7516       1 ?        01:54:27 /usr/bin/cygrunsrv
> Bliss\la    4316       1 ?        01:44:48 /prog64/vim/gvim
>
>   -- but my Xstartup log claims not to see it:
> [197140.538] MIT-SHM extension disabled due to lack of kernel support
> [197140.538] XFree86-Bigfont extension local-client optimization
> disabled due to lack of shared memory support in the kernel
> [197140.553] glWinSelectGLimplementation: Loaded 'cygnativeGLthunk.dll'
>
> --

for my test, it works
of course you need to put care to avoid collision between
32 bit and 64 bit if you have both installed.

testing on 64bit  Xwin with cygserver running I see

[ 13438.222] Initializing built-in extension MIT-SHM


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